Question

Three clocks alarms at an interval of 12, 21 and 36 minutes respectively. At a certain time they begin to alarm together. What length of time will elapse before they alarm together again?
A) 4 hours 24 minutes
B) 4 hours 12 minutes
C) 1 hour 36 minutes
D) 5 hours

Answer 1

1 hour 36 minutes.

I hope it’s correct.

Plz mark me as the brainliest.

Answer 2

hey mate here is your answer

option b

plz mark as brainiest