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3 years ago

10

46 Two light houses ash their lights every 30 seconds and 40 seconds respectively. Given that they last ashed together at 10:40

A.M., when will they next ash together? (Chapter 1)

1 answer:

IRISSAK [1]3 years ago

8 0

30,60,90,120
40,80,120

they will both " ash " in 120 seconds (thats 2 minutes)...so they will both ash at
10:42 a.m.

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