Question

if ratio of time periods of two pendulum is 1:2 , then the ratio of their lengths will be......

Answer 1

If ratio of time is 1 : 2 then ratio of lengths will be 1 : 4

Answer 2

$\textbf{UR ANSWER}$



$\textbf{T}$=2π√[l/g]

we can se T² is directly $\textbf{proportional to length}$

$\textbf{so}$ L1/L2=(T1/T2)²

T1/T2 is 2:1

$\textbf{so}$ L1/L2=4/1