Question

The length of simple pendulum executing SHM is increased by 21%. The percentage increase in the time period of the pendulum is -

• A. 10%
• B. 11%
• C. 21%
• D. 42%

Answer 1

Answer: (A)

10%

Answer 2

$\frac { 11 } { 10 }$T

× 100%

= $\left( \frac { 11 } { 10 } - 1 \right)$ × 100%

= 10%