Question

CLASS 10
25 POINTS

I JUST NEED ANSWER

On a road, 3 consecutive traffic lights change after 36,42 and 62 seconds at what time will they change simultaneously?​

Answer 1

$28 \times 9 \times 31 =$

Answer 2

ANSWER

The lights will change simultaneously after every interval = (LCM of 36,42 and 72) seconds

LCM =2×2×3×3××2×7=504

504 seconds =8 minutes and 24 seconds

The next change will be at 9:08:24.