Question

5. Three traffic lights glow at intervals of 6. 12 and 15 minutes. If they glow together at
8:15 pm, when will they glow next time together.​

Answer 1

Answer:

9:15 pm

Step-by-step explanation:

First take the LCM of 6, 12 and 15 minutes, which is equal to 60 minutes, which is 1 hour.

Hence, after 8:15 pm, all three will next glow after 1 hr, which is 9:15 pm

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