Question

Neeraj reaches school in a car at an average speed of 20 km/h. While returning; his speed become 30 km/h due to lesser crowd. What is the average speed of Neeraj's car for the whole journey?​

Answer 1

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24 km/hr

Explanation:

Let the total distance covered be 2x

so for x km, he travel at speed of 20km/hr and next x km at speed of 30km/hr.

(see attachment for solved answer)