2015 · Q31
Two trains, one is of 121 m in length at the speed of 40 km/hour and the other is of 99 m in length at the speed of 32 km/hour are running in opposite directions. In how much time will they be completely clear from each other from the moment they meet ?
Elementary MathematicsAlgebra
- A10 s
- B11 s
- C16 s
- D21 s
Explanation
Relative speed = 72 km/h = 20 m/s and total length = 220 m, so time = 220/20 = 11 s. Hence option (b).