Discussion Room : Quant
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@zabeer
A sphere passes through the midpoints of the twelve edges of a cube that has edges of length 6 inches. What is the surface area of the sphere, in square inches? Express your answer in terms of pi.
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What is the remainder when 13^66 – 23 is divided by 183?
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Usain is an athlete. While running, the number of calories burnt by him is directly proportional to the square root of his speed. If he runs 10 km at a constant speed of 25 km/hr, the total number of calories burnt is equal to 2400. On a particular day he ran at a constant speed of 36 km/hr and burnt 1800 calories. What was the distance run by him on that day? (Assume that calories burned are directly proportional to the distance travelled)
Can anybody help.
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@deepalis727
Given : No. of calories ∝ dist × √ (Speed)
so we can say that No. of calories burnt = K×dist×√ (Speed)
2400=K×10×5, Here k comes out to be "48".
Now, 1800=Dist×48×6
Dist=6.25 Km
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Please explain.
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SOLVE
(X^4+X^2+1)/(X^2-4X-5) < 0SOLVE
(X^2+6X-7)/(X^2 + 1)
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N = 2³ * 5³ * 7², how many sets of two factors of N are co-prime
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This post is deleted!
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@vinaycat2017 45:72:80
197--78800
72-28800
