the traffic lights at three different road crossing change after every 48 seconds , 72 seconds , 108 seconds respectively . if they all changes simultaneously at 8 a.m., then at what time will they again change simultaneously.?
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after tbat add these second to get your answer
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Find the L.C.M of 48, 72, 108.
L.C.M is 432.
432 seconds = 7 minutes 12 seconds.
They again change simultaneously at 8:07am 12 seconds
L.C.M is 432.
432 seconds = 7 minutes 12 seconds.
They again change simultaneously at 8:07am 12 seconds
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