Question

A pendulum of length 36 cm has time period 1.2 s. Find the time period of another pendulum of length 81 cm.

Answer 1

Answer:

2.7 s

Explanation:

if 36 cm takes 1.2 s

1 cm will take 1.2/36 s

and 81 cm will take 1.2*81/36 = 2.7 s

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Answer 2

Answer:

2.7 is the answer it is correct