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If the percentage decrease in the length...

If the percentage decrease in the length of a simple pendulum is 10%, then find the percentage decrease in its time period

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`(i) l_2 = l_1 - 10 % ` of ` l_1 (T_1)/(T_2) = sqrt((l_1)/( l_2)) ,(T_2-T_1)/(T_1)xx 100`
`(ii) 5 %`
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