BA LLB Banaras Hindu University 2019 Solved Paper

Question : 112 of 170

Marks: +1, -0

Five bells first begin to toll together and then at intervals of

3,5,7,8

and

10 {s}

. Find after what interval they will again toll together. How many times does they toll together in one hour?

Solution:

Required time interval = LCM of

3,5,7,8

and

10=840 {s}=14 {min}

Number of times they will toll together in one hour

=\;{60}/{14}=4

times

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