Q(6)Three bulbs red,green and yellow flash at internwel of 80seconds,90seconds and 110seconds. All three flash together at 8:00am.At what time the three bulbs flash al together again?
(a)10:20am
(b)10:10am
(c)10:12am
(d)10:23am
Answers
Answered by
0
Answer:
LCM of 80, 90, 110 = 7920
7920 in minutes = 7920/60
= 132
=2 hours 12 minutes
8 + 2 hours 12 minutes equals 10:12 am
Answered by
0
Answer:
(c) 10:12 am
Step-by-step explanation:
LCM of 80, 90 and 110 = 7920
The bells will flash together every 7920 seconds or 132 minutes which is equal to every 2 hours and 12 minutes.
If they flash together at 8:00 am, they will flash together again exactly 2 hour and 12 minutes after that, which is at 10:12 am.
Similar questions