A. 5.0s
B. 8.7s
C. 10.0s
D. 17.3s
E. 20.0s
Correct Answer:
Option B – 8.7s
Explanation
t = T/2=1/2
=2usinθ/g=(100×sin60)/10
10 sin60 = 10 x 0.8660
= 8.7
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