Question

two runners a and b halt after 3 hours and 5 hours while running after how many hours will both of them halt together

Answer 1

Hello,

The runners halt after the specific time.

The given times are :-

A = 3 hours

B = 5 hours.

Now,
At what time will they halt together.

This can be solved by finding the LCM of the two given times
3 hours and 5 hours.

LCM will be 15 hours.

See
A will halt every three hours and B will halt every 5 hours
So,
For example both a and b start at 12 o clock

A will halt at time
3, 6, 9, 12, 15, 18, 21....

B will halt at
5, 10, 15, 20, 25, 30....

So ,
Common is 15 hours
So
They will halt together at every 15 th hour.



Hope this will be helping you.....

Answer 2

Step-by-step explanation:

• P=3 hours
• Q=5 hours

LCM of 3 hours and 5 hours

• Q= 5 hours

start 12.0 clock

• 3,6,9,12,15,18,21

Q= 5,10,15,20,25,30

common is 15 hours

(15is two digit number)

Hence