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A car covers the first half of the dista...

A car covers the first half of the distance between two places at 40 km/h and other half at 60 km/h. The average speed of the car is

A

60 km/h

B

50 km/h

C

78 km/h

D

48 km/h

Text Solution

Verified by Experts

The correct Answer is:
D
Let u Is the average velocity of x Is the totel distance covered by car then
`t = x/u = x/(2 xx 40) + x/(2 xx 60)`
` = x/u = x/80 + x/120 = (5x)/240`
`u = 240/5 = 48 km //h`
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