Five bells in a church toll at interval of 12 seconds 15 seconds 20 seconds 25 seconds and 45 seconds respectively. If all of them toll at 5 am. What time next They will toll together?

5.10 am

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5.12 am

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5.15 am

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5.20 am

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None of these

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Solution

The correct option is C 5.15 am
Since all are to toll together next this interval has to be the L.C.M. of 12, 15, 20, 25, and 45 which is 900 seconds or 15 minutes
$∴$ Time when all five bells will toll together next is 5.15

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Five bells in a church toll at interval of 12 seconds 15 seconds 20 seconds 25 seconds and 45 seconds respectively. If all of them toll at 5 am. What time next They will toll together?

The correct option is C 5.15 amSince all are to toll together next this interval has to be the L.C.M. of 12, 15, 20, 25, and 45 which is 900 seconds or 15 minutes∴ Time when all five bells will toll together next is 5.15

The correct option is C 5.15 am
Since all are to toll together next this interval has to be the L.C.M. of 12, 15, 20, 25, and 45 which is 900 seconds or 15 minutes
$∴$ Time when all five bells will toll together next is 5.15