Walking at a speed of 5 km per hour, a man covers a certain distance in 3 hours. If he covers the same distance once by car at a speed of 30 km per hour and once by cycle at a speed of 15 km per hour, what will be the time taken by him?

Which of the following speeds is the least?

Two men P and Q start together from place A at 3 km/h and 3.75 km/h respectively for place B. Q reaches half an hour before P. What is the distance that each one has covered ?

'A' rides a cycle at an average speed of 30 km/h and reaches the destination in 6 hours. B covers the same distance in 4 hours. If A increases the average speed by 10 km/h and B increases the average speed by 5 km/h What would be the difference in their time taken to reach the destination ?

A train running at a speed 360 km/hr passes a platform with double length in 30 sec. Find the length of platform.

The speed of the boat in still water is 20 km/hrs and speed of the stream is 5 km/hr. Find the time taken to travel 50 km downstream and 30 km upstream by the boat.

A train travels 92.5 km/hr. How many meters will it travel in 18 minutes?