## Answers

volume = 20 yards^3 / hr

1 yard = 3 ft

1 hour = 3600 seconds

= 0.15ft^{3}/sec

20 yards^3 / hour

1 yard = 3 ft

1 cubic yard = (3)^3 ft^3

1 cubic yard = 27 ft^3

therefore

20 cubic yard = 20 x 27 = 540 ft^3

1 hour = 60 mins

therefore we can write

540 / 60 = 9 ft^3/min.

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