Question

A Car moves 45km in 45 min.What
is it speed in kilometres per hour

Answer 1

`s=(d)/(t)\\\\d=45\text{ km}\\t=45\text{ min}=0.75\text{ h}\\\\s=\frac{45\text{ km}}{0.75\text{ h}}=60\frac{\text{km}}{\text{h}}`

Answer 2

Hello !

45min = 3/4h = 0,75h

`(45km)/(0,75h) \\\\= (45km*(1)/(0,75) )/(0,75h*(1)/(0,75) ) \\\\= (60km)/(1h)`

s = 60km/h