Question

a jet travels 490 miles in 5 hours . at this rate , how could the jet fly in 9 hours? what is the rate of speed of the jet ?

Answer 1

it travels 490 miles in 5hours... it's speed rate is obvioulsy \(\bf \cfrac{\cancel{ 490 }miles}{\cancel{ 5 }hours}\implies ?\)

and if it travels 490 in 5 hours... how many miles in 9hours? well \(\large \begin{array}{ccllll}
miles&hours
\\\hline\\
490&5\\
x&9
\end{array}\implies \cfrac{490}{x}=\cfrac{5}{9}\)