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The length of simple pendulum executing ...

The length of simple pendulum executing SHM is increased by `69%` The percentage increase in the time period of the pendulum is

A

`30%`

B

`11%`

C

`21%`

D

`42%`

Text Solution

Verified by Experts

The correct Answer is:
A
`(T)/(T)=sqrt((169)/(100)), T=(13)/(10)T`
`((T)/(T)-1)xx100%=((13)/(10)-1)xx100%=30%`
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