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17-09-2020
Mathematics

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A traffic light changes every 30 seconds another traffic light changes every 40 seconds both lights just changed after how money minutes will both lights change at the same time

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emiiilyy emiiilyy

18-09-2020

Answer:

120 seconds/2 minutes

Step-by-step explanation:

You need to find the LCM of 30 and 40 which is 120.

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