Question

a plum with a mass of 35 g contains 30 cal of nutritional energy. how many plums should a person consume to get 120 cal of energy?
2 plums
4 plums
6 plums
8 plums

Explanation:

Step1: Set up proportion

Let $x$ be the number of plums. We have the proportion $\frac{1}{30}=\frac{x}{120}$.

Step2: Cross - multiply

$30x = 120$.

Step3: Solve for $x$

$x=\frac{120}{30}=4$.

Answer:

B. 4 plums