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- 50 km/h
- 60 km/h
- 40 km/h
- 48 km/h

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Solution

Verified by Toppr

Letx consider, x= total distance covered by the car,

Time taken to complete the half distance with velocity v=40km/h,

t1=x2×40=x80hr. . . . .(1)

The time taken to complete another half distance with velocity u=60km/h

t2=x2×60=x120hr

The total time taken, t=t1+t2

t=x80+x120=x48hr

The average speed of the car,

vavg=xx/48=48km/h

The correct option is B.

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