Question

A simple pendulum with string length 90 cm, takes 30 s to complete 20 oscillations. What is the time period of this pendulum? a) 1.5 s b) 2 .0 s c) 1.6 s d) 8 s

Answer 1

Answer:

1.5 sec

Step-by-step explanation:

time taken to complete 1 oscilaation = time period

20:30::1:x

3/2 sec