Question

. A person covers 100 m with a speed of 20 m/s and another of the 200 m with a speed of 50 m/s. Find its average speed?

Answer 1

Answer:

4.5m/s is the answer. .........

Answer 2

Answer:

4.5m/s

Explanation:

100m covered in 20m/s.

1m covered in 100/20m/s =5m/s

let t1=5

now

similarly 200m covered in 50m/s

so 1m covered in 200/50m/s=4m/s

and let t2=4

now avg time =(t1+t2) /2

=(5+4)/2

=9/2 =4.5m/s.(ans)