A truck travels 150 km from A to B at 75 km/hr. and returns from B to A along the same route at 50 km/hr. The average speed, in kilometers per hour, for the round trip is:

Question: A truck travels 150 km from A to B at 75 km/hr and returns from B to A along the same route at 50 km/hr. The average speed, in kilometers per hour, for the round trip is:

Solution:
Here round trip means total distance 150 + 150 = 300 km
And total hours = (150/75) + (150/50) = 2+3 = 5 hours

∴ Average Speed: 300/5 = 60 km/hr. [ মোট দূরত্বকে মোট সময় দ্বারা ভাগ করলে গড় গতিবেগ পাওয়া যায়]