Question

In a lighting, green light glows after
every 12 seconds, red light glows after
every 30 seconds, blue light glows after
every 34 seconds and yellow light glows
after
every 56 seconds. Find the least
time in minutes after which they all glow
together.​

Answer 1

Answer:

Red light flashes after every 30 seconds and green light flashes after every 20 seconds . How many times will they be flashing together in a day.?

Both the lights will flash 1440 times a day.

Proof:

Red light flashes after every 30 seconds and green light flashes after every 20 seconds.

L.C.M of (30,20) = 60

So, both the lights will be flashing together in every 60 seconds = 1 minute.

Number of minutes in a day= 24×60=1440

So, both the lights will flash 1440 times a day.

Thanks for reading my answer. Hope this helps. Have a good day.

Answer 2

Step-by-step explanation:

take the LCM 12,30,34,56 in a time

6*2*2*7*5*2*17=28660/120=238 Minutes