List of top Quantitative Aptitude Questions on Time, Speed and Distance asked in ATMA

A man covers a distance at 40 km/h and returns along the same road at 60 km/h. His average speed for the whole journey is:
A train 150 m long is running at 72 km/h. How long does it take to cross a platform 250 m long?
A car covers 240 km in 4 hours. Travelling at the same speed, how far will it go in 7 hours?