Question

Akhil ran 15 km in 2 hours in a marathon. How many kilometres would he run in the next 3 hours if he runs at the same speed?

• A. 30 km
• B. 17.5 km
• C. 45 km
• D. 22.5 km

Answer 1

The correct option is D 22.5 km

Akhil ran 15 km in 2 hours.
Speed = $\frac{\mathrm{distance}}{\mathrm{time}}$ = $\frac{15}{2}$

Hence, if he is running for the next 3 hours at the same speed, the ratio would be the same.
Let the distance he runs be x.

$\frac{15}{2}=\frac{x}{3}x=\frac{15\times 3}{2}=\frac{45}{2}$
So, in the next three hours, Akhil would run 22.5 km.