Question

A car travelling from Ibadan to Lagos at 90 km/hr

takes 1 hour 20 min. How fast must one travel to

cover the distance in one hour?

Answer 1

A velocity of 120km/h is needed to cover the distance in one hour

Explanation:

The velocity formula is:

`v = (d)/(t)`

In which v is the velocity, d is the distance and t is the time.

A car travelling from Ibadan to Lagos at 90 km/hr takes 1 hour 20 min.

This means that
`v = 90, t = 1 + (20)/(60) = 1.3333`

We use this to find d.

`v = (d)/(t)`

`90 = (d)/(1.3333)`

`d = 90*1.3333`

`d = 120`

The distance is 120 km.

How fast must one travel to cover the distance in one hour?

Velocity for a distance of 120 km(d = 120) in 1 hour(t = 1). So

`v = (d)/(t)`

`v = (120)/(1)`

`v = 120`

A velocity of 120km/h is needed to cover the distance in one hour