Math, asked by Akku4857, 1 year ago

On my road three consecutive traffic light changes after 36,42,72 seconds .if the lights first switched on at 9.00.am at what time will they change simultaneously

Answers

Answered by deviprasadneyyala
14

Answer:

Step-by-step explanation:

Here, the question asks us 'at what time will they change simultaneously', which means that we need to find LCM.

36 = 2×2×3×3

42 = 2×3×7

72 = 2×2×2×3×3

So, LCM = 2×2×2×3×3×7

So, LCM = 504

Thus, the lights change after every 504 seconds.

And 504 s = 8 min 24 sec

So, the traffic lights will change again at 09:08:24 am

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