Question

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

Answer 1

The correct answer is C) 0.03.

1 square yard is a square whose sides are all 1 yard in length.  1 yard = 3 feet, so each side of this square is 3 ft; this gives us 1 yd² = 3(3) = 9 ft².  This gives us 15/9 = 1.67 yd²/min.

1 minute = 60 seconds; this gives us 1.67*60 = 0.027 ≈ 0.03 yd²/sec