Question

An olympic sprinter can run 100yd in 9.0s. At the same rate, how long would it take the sprinter to run 100m?

Answer 1

s₁ = 100 ya=91.44 m
v=s₁/t₁
t₂=s₂/v= s₂•t₁/s₁=
=100•9/91.44 =9.84 s

Answer 2

A motorist travels 80 km at 100 km/h , and 50 km at 75 km/h , what is the average speed for the trip ?