Question

Ivan can paint 25 square feet every half hour. How many square feet can he paint in 3 hours?

A. 75 square feet
B. 225 square feet
C. 50 square feet
D. 150 square feet

Answer 1

To find out how many square feet Ivan can paint in 3 hours, we first need to determine how many half-hour intervals are in 3 hours.

3 hours is equivalent to:
\[
3 \text{ hours} \times \frac{2 \text{ half-hours}}{1 \text{ hour}} = 6 \text{ half-hours}
\]

Next, we know that Ivan can paint 25 square feet in each half-hour. Therefore, in 6 half-hours, he can paint:
\[
6 \text{ half-hours} \times 25 \text{ square feet per half-hour} = 150 \text{ square feet}
\]

So, the total area Ivan can paint in 3 hours is:
\[
\boxed{150} \text{ square feet}
\]

The answer is D. 150 square feet.