Question

10
PRATIYOGIT
13. Four bells ring at an interval of 8, 12, 15 and
18 second respectively. All the four begin to
ring together. How many times will they ring
together in one hour excluding the one at the
start?
(A) 10 times (B) 20 times
(C) 30 times (D) 40 times​

Answer 1

Answer is 10 times.

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