Question

Ankur, while driving to office computes the average speed for his trip as 30km/hr. On his return trip along the same route, his average speed is 40 km/hr. What is the average speed of Ankurs trip?

Answer 1

Answer:

Average speed = total distance÷ total time

Let distance on one side=S

Time taken @ 15 KMPH = S/15 hours

Time taken @25kmph =S/25 hour

Total time taken= S/15 +S/25 =8S/75

Total distance covered=2S

Average speed= 2S ÷8S/75

2S×75/8S =18.75 KMPH

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