Question

Abdul, while driving to school, computes the average speed for his trip to be 20 kmh-1. on his return trip along the same route, there is less traffic and the average speed is 30 kmh -1 . What is the average speed for Abdul’s trip?​

Answer 1

Answer:

24 km/he

Explanation:

when distance travelled at two speeds is same then we can use direct formula:

                                            v = $\frac{2v1v2}{v1+v2}$

⇒                                         v = 2×20×30/(20+30) = 24 km/hr