Question on: JAMB Physics - 1991
A boy timed 30 oscillations of a certain pendulum thrice and obtained 1min. 10s, 1min. 12s and 1min. 7s respectively.The mean period of oscillation of the pendulum is
A
0.14s
B
0.43s
C
2.32s
D
6.97s
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Correct Option: C
Total time = (3 x 60) + 29
= 209sec
period (\frac{t}{n}) = (\frac{209}{90})
= 2.32sec
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