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A car travels the first half of a distan...

A car travels the first half of a distance between two places a speed of 30 km/hr and the second half of the distance a 50 km/hr. The average speed of the car for the whole journey is

A

42.5 km/hr

B

40.0 km/hr

C

37.5 km/hr

D

35.0 km/hr

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The correct Answer is:
C
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AAKASH SERIES-MOTION IN A STRAIGHT LINE -PRACTICE EXERCISE
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  18. A bullet moving at 20 m/sec. strikes a wooden plank and penetrates 4 c...

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  20. A vehicle moves for 10 minutes at 20 "ms"^(-1) due north and stops for...

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