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If a car covers (2)/(5)^(th) of the tota...

If a car covers `(2)/(5)^(th)` of the total distance with `v_1` speed and `(3)/(5)^(th)` distance with `v_2`. Then average speed is

A

`(1)/(2)sqrt(v_(1)v_(2))`

B

`(v_(1) + v_(2))/(2)`

C

`(2v_(1)v_(2))/(v_(1) + v_(2))`

D

`(5v_(1)v_(2))/(3v_(1) + 2v_(2))`

Text Solution

Verified by Experts

The correct Answer is:
D
avg speed ` = ("total distance")/("total time") (s_(1) + s_(2))/((s_(1))/(v_(1))+(s_(2))/(v_(2)))`
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