Question 5

Explanation

To solve this problem, we first need to calculate the calorie content of watermelon per $100$ grams, and then calculate the total calories for a weight of $250$ grams.

Calculating Watermelon Calories per 100 grams

It is known that the calorie content of pears per $100$ grams is $57$ cal. The calorie content of watermelon is half that of a pear:

Calculating Watermelon Calories for 250 grams

We use direct proportion. If $100$ grams of watermelon contains $28.5$ calories, then for $250$ grams:

Conclusion

Therefore, the calorie content of $250$ gr of watermelon is $71.25$ cal.