Question

A person seems hundred metre in the first 40 seconds 80 metre in the next 40 seconds and 45 metre in the last 20 seconds what is the average speed?

Answer 1

Answer:

2.25 m/s

Explanation:

Case I:

D = 100 m

t = 40 s

Case II:

D = 80 m

t = 40 s

Case III:

D = 45 m

t = 20 s

Thus, Average speed = (total Dist.)/(total time)

= (100+80+45)(40+40+20)

= 225/100

= 2.25 m/s