Here nf(x)= f(x^n) F(343sqrt3)= 3f(7)+1/2f(3) F(7) and f(3) can be found using given values.

Let length of train is is ‘L’ km and speed ‘S’ Km/hr L/X-11 = 20/3600 = 1/180 L/X = 9/3600 = 1/400 X = 400 L 180 L = X – 11 180L = 400L-11 220L = 11 L = 11/220 = 1/20 KM = 1000/20 =50 meters

Angle = 30x - 11y/2 = 30 * 7 – 11 * 30/2 = 210 – 165 = 45 degree.

At first ON -> 8/3 16/3 14/3 15/2 Each word is put off after a second So Om will flash after -> 8/3+1 = 11/3 seconds Similarly Innovative -> 19/3 Book -> 17/3 Store -> 15/2 + 1 = 17/2 So all will together after LCM [ 11/3 , 19/3, 17/3,17/2] = 11 * 19 * 17 = 3553 SEC