Question

The school bell in School A rings every 30 minutes while the school bell in School B rings every 40 minutes. How long will it take for the bells in both schools to ring together?

Answer 1

Answer:

we know that, the bell will rings again at the same time will be LCM of their individual time. → LCM = 2 * 2 * 2 * 3 * 5 = 120 minutes. therefore, we can conclude that, both bells will ring again together after 120 minutes or 2 hours.

Step-by-step explanation:

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Answer 2

Answer:

by lcm

we get

120 minutes

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