A train 'B' speeding with 100 kmph crosses another train C, running in the same direction, in 2 mins. If the length of the train B and C be 150m and 250m respectively, what is the speed of the train C (in kmph) ?
Show answer & explanation
Correct answer: B
Explanation
The correct option is 2.
Given, speed of train B = 100 kmph
Let speed of train C = x kmph
length of train B = 150 m = 0.15 km
length of train C = 250 m = 0.25 km
time taken = 2 mins = 
time taken = 
100 − x = 0.4 × 30
100 − 12 = x
x( speed of the train C) = 88 kmph