45
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To get the answer, multiply 16 by 30.
The radius is 15 feet 2r=30 30/2=15 15 is the radius
-- take the number of [ miles per hour ]-- multiply by [ 22/15 ]-- the answer is the number of [ feet per second ].30 mph = 44 fps
435 square feet (just multiply 29 x 15)
multiply 30 by 40 30X40 = 1,200 square feet == ==