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Question

A car moves a distance of 200 m. It covers the first half of the distance at speed 40 km/h and the second half of the distance at speed v. If the average speed is 48 km/h, then the value of v is-
  1. 50 km/h
  2. 56 km/h
  3. 58 km/h
  4. 60 km/h

A
58 km/h
B
50 km/h
C
56 km/h
D
60 km/h
Solution
Verified by Toppr

Given, Distance=200m,Speed=40km/h Average speed =48km/h

48=20010040+100v140+1v=124v=12053=1202=60km/h

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