- On Delhi road, three consecutive traffic lights change after 36, 42 and 72 seconds. If the lights are first switched on at 9:00 am, at what time will they change simultaneously?
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Answer:
They will change at 9:02:30
Step-by-step explanation:
36+42+72
= 150
60 secs = 1 min
120 secs = 2 mins
= 2m 30s
that's why answer is 9:02:30
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