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A uniform thin rod AB of length L has li...

A uniform thin rod AB of length L has linear mass density `mu(x) = a + (bx)/(L)`, where x is measured from A. If the CM of the rod lies at a distance of `((7)/(12)L)` from A, then a and b are related as :_

A

`2a = b `

B

`a = 2b `

C

`a = b `

D

`3a = 2b`

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The correct Answer is:
A
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NTA MOCK TESTS-NTA JEE MOCK TEST 97-PHYSICS
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