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Question

A car travels from A to B at a, speed of 20kmh1 and returns at a speed of 30kmh1. The average speed of the car for the whole journey is:
  1. 5kmh1
  2. 24kmh1
  3. 25kmh1
  4. 50kmh1

A
5kmh1
B
24kmh1
C
25kmh1
D
50kmh1
Solution
Verified by Toppr

Let distance from A to B be x
Time for travel from A to B= x/20
Time for travel from B to A= x/30
Hence,speed for total distance 2x is: 2xx30+x20=2x×605x=24 km\hr

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