Question

The traffic lights at three different roads crossing change after every 48 seconds, 72 seconds and 108 seconds. If they all change simultaneously at 8 am, then at what time will they again change simultaneously.

Answer 1

The answer is

LCM of 48,72,108

U find the least common multiple of these numbers and add the LCM to 8am

Then the time u get will be ur answer

Answer 2

Answer:

Here's the answer of your question ,grab it.

Step-by-step explanation:

GIVEN -

BLINKING TIME OF FIRST LIGHT-48 SEC

BLINKING TIME OF SECOND LIGHT-72SEC

BLINKING TIME OF THIRD LIGHT-108SEC

MYSTERY TOPIC-

AT WHAT TIME WILL THE TRAFFIC LIGHTS CHANGE SIMULTANEOUSLY????

in this type of questions we we have to find the LCM of the given integers-

so the LCM of 72 ,48 and 108 is- 432

means after 432 sec the lights will change simultaneously.

let's convert that to minutes-

$\frac{432}{60} = 7.2 \: minutes$

so they have changed at 8:00 so now they will change at -

$8.00 + 7.2 = 8.07$

means at 8:07minutes and 12 seconds

MYSTERY RESOLVED

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