Two bulbs flash at regular intervals of 30 and 36 seconds respectively. they flash together at 10.45. at what time will they flash together (a) a second time? (b) a 5th time?
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Answered by
45
Two bulbs flash at regular intervals of 30 and 36 seconds respectively.
LCM of 36and 30= 180.
180/60 = 3 minute
They will flash together in every 3 min.
If they flashed together at 10:45.
a) second time they will flash together will be 10:45+3min = 10:48.
b) fifth time they will flash together will be 10:48+9min = 10:57 (as they already flashed twice).
Hope it helps.
LCM of 36and 30= 180.
180/60 = 3 minute
They will flash together in every 3 min.
If they flashed together at 10:45.
a) second time they will flash together will be 10:45+3min = 10:48.
b) fifth time they will flash together will be 10:48+9min = 10:57 (as they already flashed twice).
Hope it helps.
Answered by
5
Answer:
10:48, 10:57
Step-by-step explanation:
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