Question

A car is moving at an average speed of $56\frac{3}{5}$ km per hour. How much distance will it cover in $7\frac{1}{2}$ hours?

Answer 1

$$\begin{gathered} \begin{array}{l}\text{Average speed}=\text{56}\frac{3}{5}\text{km/h}\\ =\frac{283}{5}\text{km/h}\\ \text{Time}=7\frac{1}{2}\mathrm{h}\\ =\frac{15}{2}\text{h}\\ \text{Distance}=\text{Speed}\times \text{Time}\\ \text{=}\frac{283}{\sout{5}}\times \frac{\sout{1}{\sout{5}}^3}{2}\\ =\frac{849}{2}\\ \text{= 424}\frac{1}{2}\text{km}\end{array} \\ \mathrm{The}\mathrm{car}\mathrm{will}\mathrm{cover}424\frac{1}{2}\text{km in}7\frac{1}{2}\mathrm{h}. \end{gathered}$$