Question

A car travels 220 km in 4 hours.Find the speed of the car.

Answer 1

By the proporties of ratio proportion,

4:1::220:x

$\sf \implies \: \frac{4}{1} = \frac{220}{x} \\ \\ \sf \implies \: 4x = 220 \\ \\ \sf \implies \: x = \frac{220}{4} \\ \\ \sf \: = 55 \frac{km}{hr}$