Question

A red light flashes every 18 seconds.

A green light flashes every 27 seconds.

Both lights flash together.

How many seconds will it be before the lights flash at the same time again? Write your answer as a single number with units.

Answer 1

Answer:

After every 45 seconds these both the light's flash together ....thank you..

Answer 2

LCM of 18,27

18=3^2 x 2

27= 3^3

27 x 2 = 54 seconds

Red light and green light flashed together at 54 seconds

please mark me as brainliest

Sabharish G