Mathematics: Two light houses flash their lights every 30 seconds and 40 seconds respectively. given that they last flashed together at 10: 40 a.m., when will they next flash together?

Two light houses flash their lights every 30 seconds

Ответ:

keke6361

05.01.2022

If they flash at 30 and 40 seconds, then a diagram showing their timing helps

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

So after 120 seconds, both lighthouses flash at the same time
120 sec = 2 minutes

So the answer is 10:42

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Ответ:

Carly9189

14.09.2022

Mathematics

25.5

Step-by-step explanation:

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Two light houses flash their lights every 30 seconds and 40 seconds respectively. given that they last flashed together at 10: 40
a.m., when will they next flash together?

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