Question
The distance between town A and town B is 555 km. A train
leaves A at 7 a.m. at a speed of 60 km/h. Another train leaves B at 9 a.m. towards A at a speed of 90 km/h. At what time will they meet?Solution
The train from A starts 2 hours earlier.
Distance travelled = 60 × 2 = 120 km
Remaining distance = 555 – 120 = 435 km
Relative speed = 60 + 90 = 150 km/h
Time to meet = 435 / 150 = 2.9 hours = 2 hours 54 minutes
Meeting time = 9:00 a.m. + 2h 54m = 11:54 a.m.
Ratio of the lengths of two trains ‘X’ and ‘Y’ is 5:7 respectively and the ratio of time taken by them to cross a pole is 2:3 respectively. If s...
An Indian express train is traveling at 9/15th of its normal speed and takes 45 hours to reach its destination. How much time would be saved if the trai...
Speed of a car is (v + 2) km/h, which is 8 km/h less than that of bike. Time taken by car to cover 96 km is 20% less than the time taken by bike to cov...
Two trucks ‘M’ and ‘N’ started simultaneously from cities ‘X’ and ‘Y’ respectively towards each other. When they met after 9 hours, truc...
- Two trains of lengths 90 m and 70 m are moving towards each other at speeds of 4 m/sec and 6 m/sec. How many seconds will they take to cross each other?
Train 'A' having a speed of 15 m/s can cross a man in 8 seconds. The length of train 'B' is 60 metres more than the length of 'A'. If the speed of 'B' i...
Train A and train B cross a pole in 8 sec and 9 sec respectively. Train A can cross a platform in 18 sec and train B can cross the same platform in 24 s...
Train 'A' takes 36 seconds to pass a boy standing on a platform, moving at a speed of 15 m/sec. The speeds of trains 'A' and 'B' are in the ratio of 5:6...
Speed of two trains 'A' and 'B' is 22 m/s and ___ m/s respectively. Length of 'B' and 'A' is ___ metres and 330 metres, respectively. Time taken by the...
A train moves at 90 km/h to arrive at its station on time. If it moves at 100 km/h, it will arrive 15 minutes earlier. Find the t...
