Please explain how to solve:
Laura can pressure wash her driveway at an average rate of 15 square feet per minute. Which is closest to this rate in square yards per second?
A. 0.35
B. 0.24
C. 0.03
D. 0.01
15 (square feet) = 1.66666667 square yards
1.66666667 /60 = 0.0277777778
To solve this problem, we need to convert the given rate from square feet per minute to square yards per second. Here are the steps to do that:
Step 1: Convert minutes to seconds.
Since the given rate is in square feet per minute, let's convert minutes to seconds. There are 60 seconds in a minute, so we can multiply the rate by 60 to convert from minutes to seconds:
15 square feet per minute * 60 seconds per minute = 900 square feet per second.
Step 2: Convert square feet to square yards.
To convert square feet to square yards, we need to divide the square footage by 9 (since there are 9 square feet in a square yard). So, let's divide 900 square feet by 9:
900 square feet / 9 = 100 square yards.
So, the rate of 15 square feet per minute is equivalent to 100 square yards per second.
Now let's compare this to the given options:
A. 0.35 square yards per second - This is not the closest answer.
B. 0.24 square yards per second - This is not the closest answer.
C. 0.03 square yards per second - This is not the closest answer.
D. 0.01 square yards per second - This is the closest answer.
Therefore, the closest rate to 15 square feet per minute in square yards per second is approximately 0.01 (Option D).