Question

For the school anniversary the gateway is decorated with blinking lights.The green lights glow every 4seconds and the blue lights glow every 6sec.They glow together at 8'o clock.At what time do they glow together next?

Answer 1

Answer: At 08:12 'o'clock.

Answer 2

The Green lights and the Blue lights will glow together after 8'o' clock is at the time of 8:00:12.

Step-by-step explanation:

Given:

For the school anniversary the gateway is decorated with blinking lights.

The green lights glow every 4 seconds and the blue lights glow every 6 sec. They glow together at 8'o clock.

To find:

At what time do they glow together next?

Solution:

Green light glows at every 4 seconds whereas blue light glows at every 6 seconds .

LCM of 4 and 6 is 12

Therefore, they will glow again after 12 seconds.

Then, the Green lights and the Blue lights will glow together after 8'o' clock is at the time of 8:00:12.

To know more:

three traffic lights glow at intervals of 4,8 and 10 minutes.if they glow together at 4:20 pm, when will they glow next time together?

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