A. 72 sec

B. 132 sec

C. 192 sec

D. 252 sec

2 trains starting at the same time from 2 stations 200km apart and going in opposite direction cross each other at a distance of 110km from one of the stations. What is the ratio of their speeds?

Speed of a boat in standing water is 9km ph and the speed of the stream is 1.5km ph. A man rows to a place at a distance of 105km and comes back to the starting point. The total time taken by him is

A farmer travelled a distance of 61 km in 9 hours. He travelled partly on foot @ 4 km/hr and partly on bicycle @ 9 km/hr. The distance travelled on foot is:

Two trains are running at 40 km/hr and 20 km/hr respectively in the same direction. Fast train completely passes a man sitting in the slower train in 5 sec. what is the length of the of the fast train

A and B are two stations 300 km apart. Two trains T_{1} and T_{2} start from A and B respectively, towards each other at the same time. T_{1} reaches B nine hours and T_{2} reaches A four hours after they meet. Find the difference between the speeds of T_{1} and T_{2}