A car travels 180 km from A to B at 60 kilometers per hour and returns from B to A along the same route at 90 kilometers per hour. The average speed, in kilometers per hour, for the round trip is :

Question

A car travels 180 km from A to B at 60 kilometers per hour and returns from B to A along the same route at 90 kilometers per hour. The average speed, in  kilometers per hour, for the round trip is :

Accepted Answer

সঠিক উত্তর: 72। ব্যাখ্যা: