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A body covers half distance with a speed...

A body covers half distance with a speed of 20 m/s and the other half with a speed of 30 m/s. The average speed of the whole journey is

A

`25" m/s"`

B

0

C

`24" m/s"`

D

`2.5" m/s"`

Text Solution

Verified by Experts

The correct Answer is:
C
Average speed, `v_("av") = (2v_1 v_2)/( v_1 + v_2) = (2 xx 20 xx 30)/( 20 + 30) = (1200)/(50)`
`= 24" m/s"`
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