Question

Good evening to every one
Please answer to my question
On MG road, Three consecutive traffic lights change after 36, 42 and 72 seconds, If the lights are first switched on at 9:00 am, at which time will they change simultaneously?
(Class 10 Real number)

Answer 1

Lets find the L.C.M

So the L.C.M is 504

504 seconds = 8 minutes 24 seconds

So at 9 : 08 : 24 Am they will change simultaneously.

Hope it helps you :-)

Have a good day.

Answer 2

Hey Sneha Verma ☺☺

They will change simultaneously after a time which is a common multiple of 36, 42 and 72 seconds
= LCM (36, 42 and 72 seconds) = 504 Seconds

= 8 mins and 24 seconds

So the next time = 9:08:24

Hope it helps ..

plz mark this as brainlist..