Question

a person swims 100m in the first 40s , 80m im the next 40s and 45 m in the last 20s . what is the average speed

Answer 1

Answer:-

Given:-

• Case¹ :

Distance = 100 m

Time = 40 s

• Case² :

Distance = 80 m

Time = 40 s

• Case³ :

Distance = 45 m

Time = 20 s

To Find:-

Average speed of the swimmer.

_________...

We know,

Average speed = (Total distance covered)/(Total time taken)

∴ v(av) = (100m + 80m + 45m)/(40s + 40s + 20s)

➵ v(av) = (225m)/(100s)

➵ v(av) = 2.25 m s^-1

∴ Average speed of the swimmer was 2.25 m s^-1.