Question

There is a circular track of length 400 mts. If a and b starts at the same point but in opposite direction with a speeds of 8 m/sec and 12 m/s respectively. Then at what time after the beginning they will meet for the second time?

Answer 1

Answer:

Step-by-step explanation:

Length of circular track is 400 m

They run in opposite direction.

they have to cover combined 400 m distance to meet again.

as they run in opposite direction their speed will add.

so their combined speed will be 8+12 = 20 m/s

now they have to cover 400 m distance with a speed of 20m/s

Time = Distance / Speed

Time = 400/20 = 20 second

so they meet at every 20 second if they continue.