Aman goes from A to B at a speed of 40 km/h. Using the same route, he comes back from B to A, at a speed of 55 km/h. What is his approximate average speed for the whole journey?
Answer & explanation
Correct answer: option 3
Average speed = \(\frac{2 ×S1 × S2}{S1 + S2}\)
= \(\frac{2 × 40 × 55 }{40 + 55 }\)
= 46.2157 km/h
= 46.32 km/h ( approx)