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A car covers AB distance with first one-...

A car covers AB distance with first one-third at velocity `v_(1)ms^(-1)`, second one-third at `v_(2)ms^(-1)` and last one-third at `v_(3)ms^(-1)`. If `v_(3)=3v_(1),v_(2)=2v_(1) and v_(1)=11ms^(-1)` then the average velocity of the car is ________ `ms^(-1)`.

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Verified by Experts

The correct Answer is:
18
`V_(avg)=(3d)/((d)/(11)+(d)/(22)+(d)/(33))=(3)/((6+3+2)/(66))=18m//s`
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