Question
If a jogger runs 2 miles and burns 185 calories, how many calories would he burn jogging 3 miles
Answer
If the jogger burns 185 calories when jogging 2 miles, the ratio of calories burned to miles is
185\div 2 = \dfrac{185}{2}
So when he runs 3 miles, the calories h burs is
\dfrac{185}{2} \cdot 3 = \dfrac{555}{2}