Three bulbs flash at regular intervals of 30, 36 and 45 seconds respectively. They flash
together at same time in the morning. After how many seconds will they flash together?
Answers
Answered by
5
Answer:
162 sec
Step-by-step explanation:
L.C.M of of 30,36,45
30=2* 3*5
36=2*2*3*3
45=3*3*5
L.c.M=2^2 * 3^2 * 3^2 * 2^1 * 3^1 * 5^1
L.C.M=4*9*9*2*3*5
9720/60=162
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