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Sonja [21]
3 years ago
5

One lighthouse flashes every 10 seconds, a second lighthouse flashes every 8 seconds. if they flash at the same time, how long w

ill it take to flash at the same time again? a
Mathematics
1 answer:
goblinko [34]3 years ago
6 0
For this, we need to find the lowest common multiple of 10 and 8

multiples of 10 : 10,20,30,40,50
multiples of 8 : 8,16,24,32,40

so the LCM of 10 and 8 is 40

therefore, they will both flash at the same time again in 40 seconds.
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