Question

Five different colour of lights start blinking at an interval of 4,5,7,8,10 seconds respectively. After how much time will all the lights blink together

Answer 1

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Answer 2

Therefore the time interval at which all the lights blink together is '4 seconds.

Given:

Four different colors of light blink for the following interval respectively,

⇒ 4, 5, 7, 8, 10 seconds

To Find:

The time interval for which all the lights blink together.

Solution:

The given question can be solved as shown below.

Given that,

4 different colors of light blink for the following interval respectively,

⇒ 4, 5, 7, 8, 10 seconds

As the period is given but the time at which each light blinks is not given, we can assume that all the lights start to blink at the same time.

Then the time interval for which all the lights blink together will be the time interval of the light that has the smallest time interval.

Therefore the time interval at which all the lights blink together is '4 seconds.

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