Question

Chris entered a canoe race. He rowed 3 1/2 miles in 1/2 hour. What is his average speed in miles per hour?

Answer 1

`\bf \cfrac{\quad 3(1)/(2)~miles\quad }{(1)/(2)~hour}\implies \cfrac{\quad (3\cdot 2+1)/(2)~miles\quad }{(1)/(2)~hour}\implies \cfrac{\quad (7)/(2)~miles\quad }{(1)/(2)~hour} \\\\\\ \cfrac{7}{\underline{2}}~miles\cdot \cfrac{\underline{2}}{1}~hour\implies 7(miles)/(hour)`