Solve.How many pounds of rock will you need to fill an area 20 feet by 42 feet to a depth of 2.5 inches if the rock weighs 1025 pounds per cubic yard? Round to the nearest pound.
Fill in the blank(s) with the appropriate word(s).
6644 pounds
V = Ah A = (20 ft)(42 ft) = 840 sq ft = 120,960 sq in.
V = (120,960 sq in.)(2.5 in.) = 302,400 cu in.
302,400 cu in. = 175 cu ft = 6.48148148 cu yd = 6643.510519 lb
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