Question

Four bells toll after interval of 8 9 12 and 15 seconds respectively. When will they toll again?
please say the correct answer
if u know only

Answer 1

Answer:

L. C. M of 8,9 , 12,15 = 120

1min = 60 sec,,,, 1sec = 1/60 = 120/60 = 1 min 2sec

therefore they tolll again= 1 min 2 sec

Answer 2

Answer:

Hey friend,

Here is the answer you are searching for

$time \: after \: which \: they \: all \: will \\ toll \: again = lcm \\ lcm \: of \: (8),(9),(12),(15) = 360 \\ = >time \: after \: which \: they \: all \: will \\ toll \: again = 360 \: seconds \\ = \frac{360}{60} = 6 \: minutes$

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