A) 4
B) 10
C) 15
D) 16
Correct Answer: D
Solution :
LCM of 2, 4, 6, 8, 10, 12 \[=(2\times 2\times 3\times 2\times 5)=120\] After every 2 min they toll together. Number of times they toll in 30 min \[=\left( \frac{30}{2}+1 \right)\]times = 16 timesYou need to login to perform this action.
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