CAT Question Bank  Time, Speed & Distance

Q11) P starts from Delhi to Pune. After a while he realizes he would cover 3/4 th of the distance in scheduled time and hence doubles his speed and reaches on time. He would have been late by 3 hours if he didn't change the speed. So after how much time from the start he changes the speed ?

Q12) Shyam went from Delhi to Shimla via Chandigarh by car. The distance from Delhi to Chandigarh is 3/4 times the distance from Chandigarh to Shimla. The average speed from Delhi to Chandigarh was half as much again as that from Chandigarh to Shimla. If the average speed for the entire journey was 49 kmph. What was the average speed from Chandigarh to Shimla?
(a) 39.2 kmph
(b) 63 kmph
(c) 42 kmph
(d) None of thes

Q13) Two vehicles A and B start from the same point at the same time but move in opposite directions along a circular track of radius 14 km .The initial speed of A is thrice that of B. Every time they meet , they reverse their directions and exchange their speeds. Find the shortest distance between their starting point and third meeting point.

Q14) Vinay fires two bullets from the same place at an interval of 12 minutes but raju sitting in a train approaching the place hears the second report 11 minutes 30 seconds after the first. What is the speed of train in which raju is sitting? (Speed of sound 330 meters per second)

Q15) A road passes through the town of sangamner and yeotmal. A cyclist started from sangamner in the direction of yeotmal. At the same time, two pedestrians started from yeotmal travelling at the same speed, the first of them towards sangamner and the other in the opposite direction. The cyclist covered the distance between the two towns in half and hour and continued ahead in the same direction. He over took the second pedestrian, 1.2 hours after he met the first pedestrian. Find the time the cyclist spends travelling from sangamner to the point of meeting with the first pedestrian?

Q16) Karan and Arjun run a 100metre race, where Karan beats Arjun by 10 metres. To do a favour to Arjun, Karan starts 10 metres behind the starting line in a second 100 metre race. They both run at their earlier speeds. Which of the following is true in connection with the second race?
a. Karan and Arjun reach the finishing line simultaneously.
b. Arjun beats Karan by 1 metre.
c. Arjun beats Karan by 11 metres.
d. Karan beats Arjun by 1 metre.

Q17) Two cyclists start simultaneously towards each other from Aurangabad and Ellora, Which are 28 km part, An hour later they meet and keep pedalling with the same speed without stopping. The second cyclist arrives at Ellora 35 minutes later the first arrives at Aurangabad. Find the speed of the cyclist who started from Ellora.

Q18) A bus covers a journey at an average speed of 90 km/h. If the time for which the bus stops during the journey is excluded, then the average speed for the journey becomes 108 km/h. For how much time, on an average, does the bus stop every hour?
(a) 12 minutes
(b) 10 minutes
(c) 15 minutes
(d) 7.5 minutes

Q19) Arif, Bill and Chetan were classmates and wanted to watch a movie at South City Mall right after their
class got over. Bill had an Activa bike which could accommodate a rnaximurn of two persons at a time and they wanted to reach the mall in the minimum time possible. They started simultaneously from their college, Bill and Arif on the bike and Chetan on foot. Bill dropped Arif at a certain point along the route to the mall, turned back and on his way met Chetan. He picked up Chetan and then traveled towards the mal! such that all three of them reached the mall simultaneously. Whai is the total time (in minutes) taken by them to reach the mall from their college, if the speed of the bike was 30 krn/hr, the walking speed of each of them was 6 km/hr and the distance between their college and the mall was 22.5.

Q20) Sachin and Sunil started with a speed of 40 km/hr and 18 km/hr respectively on their bikes for Patna at 8 a.m. from the same place. Sunil completed the entire journey with the same speed with which he had started. At 9:30 a.m., Sachin was stuck in traffic and had to reduce his speed. So in the next 30 minutes, he could cover only 15 km and covered the remaining distance with a speed equal in magnitude to the total time taken by Sunil in hours to cover the entire journey and reached Patna at the same time as Sunil and in broad daylight. At what time did both of them reach Patna?

Q21) Vijay went from A to B at a certain speed and came back to A from B at a speed that was 4 times the speed at which he went from A to B. The entire journey took 3 hr. Had Vijay come back at a speed that was only half the speed at which he actually returned, how long would it have taken him for the entire journey?

Q22) Two motorcyclst Ajay and vijay, start Simultaneously from a point S on an oval track and drive around the track in the same direction, with speeds of 29 kmph and 19 kmph resp. Every time ajay overtakes vijay (anywhere on track); both of them decrease there speed by 1kmph. If the length of the track is 1 Km. How many times do they meet at the starting point before vijay comes to rest?

Q23) A husband used to pickup his wife at 4 pm and reach home at 6 pm. One day he got late and called his wife at 4 pm and asked her to start walking. He left at 4.10 pm and met her in between and was able to reach home at 6 pm itself. What is the ratio of speed of wife : husband ?

Q24) A man starts from point A and walks northwards at the speed of 6 km/hr. He then turns right and walks eastwards at the speed of 4 km/hr, turns right again and walks southwards at the speed of 8 km/hr and turns left and walks eastwards at the rate of 6 km/hr. The time he walks in various directions is inversely proportional to the speed with which he walks. If the total distance he covers is equal to 100 km, then find how far he is from the starting point.

Q25) Ramesh, Ganesh, Mahesh, Jignesh decide to run around a circular garden which is 2500 m long at respective speeds of 18, 9, 72 and 36 km/hr. If they start at the same time from the same point with Ramesh and Mahesh running in same direction and Ganesh and Jignesh in opposite directions when will all four meet again at the starting point?
a) 16.5 min
b) 800 sec
c) 15 min
d) 15.5 min
e) All 4 won’t meet at the same time

Q26) R, C and S run on a linear racetrack. If R beats C by 20 seconds or 180 meters, C beats S by 40 seconds or 240 meters, what is the ratio of speeds of R and S?
a) 2 : 1
b) 1 : 2
c) 3 : 2
d) 4 : 3

Q27) By the schedule, students in a school will visit a farm and the farm's bus will arrive at the school at 7:00 AM to take the students. Because the bus has a trouble on the way from the farm to the school, the bus stops to repair. At 7:10 AM, students begin to walk to the farm. On the way, they meet the incoming repaired bus and get on it. In this way, they arrive at the farm 30 minutes later than the schedule. If the bus' speed is 6 times walking speed, how many minutes are used to repair the bus on the way?

Q28) On Monday, Lou drives his ford escort with 28inch tires, averaging x miles per hour. On Tuesday, Lou switches the tires on his car to 32inch tires yet drives to work at the same average speed as on Monday. What is the percent change from Monday to Tuesday in the average number of revolutions that Lou's tires make per second?
a) Decrease by 14.3%
b) Decrease by 12.5%
c) Increase by 14.3%
d) Increase by 12.5%
e) Cannot be determined with the given information

Q29) Two cars start simultaneously from cities A and B, towards B and A respectively, on the same route. Once the two cars reach their destinations they turn around and move towards the other city. The two cars continue shuttling in this manner for exactly 120 hours. If the speed of the car starting from A is 80 km/hr and the speed of car starting from B is 60 km/hr and the distance between the two cities is 240 km, find the number of times the two cars meet in this duration, after they start. (Assume that throughout the journey, cars from cities A and B travel at their respective uniform speeds)
a. 26
b. 30
c. 25
d. None of these

Q30) A and B start swimming simultaneously from opposite ends i.e Deep end n shallow end of a swimming pool with speeds 5m/s and 2 m/s. They swim n and after reaching opposite ends, they change the directions and continue swimming with their respective uniform speeds. When they meet for the 8th time, they meet at a distance of 10 meters from the shallow end. if the race is of the 200 rounds,
a) How many times will they meet
b) Find the length of the swimming pool