A car is moving at an average speed of 202/5 km/hr. How much distance will it cover in 15/2 hrs?

4 men and 6 boys can finish a piece of work in 5 days while 3 men and 4 boys can finish it in 7 days. Find the time taken by 1 man alone or that by 1 boy alone.

Two pipes running together can fill a pipe in 11 1/9 minutes. If one pipe takes 5 mins more than the other to fill the tank separately. Find the time in which each pipe would fill the tank separately.

A train 210 m long took 12 seconds to pass a 90 m long tunnel. Find the speed of the train.

A swimming pool has four faucets. The first can fill the entire pool with water in two days, the second - in three days, the third - in four days and the last one can fill the pool in 6 hours. How long will it take to fill the pool using all 4 faucets together?