Question

Josh drives 504 miles in 8 hours. At the same rate, how many miles would he drive in 5 hours?

Answer 1

`\begin{array}{ccll} miles&hrs\\ \cline{1-2} 504&8\\ x&5 \end{array}\implies \cfrac{504}{x}=\cfrac{8}{5}\implies 2520=8x\implies \cfrac{2520}{8}=x\implies 315=x`

Answer 2

315 miles

Explanation:

The unit rate is 63 miles per hour, and 63×5=315 miles.