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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-50 km/h56 km/h58 km/h60 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/h48=20010040+100v⇒140+1v=124⇒v=1205−3=1202⇒=60km/h

180
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