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You have given 3 dimensions which would calculate a volume. The acre is a measurement of area, so there should be 2 dimensions for the calculation. Possibly the area you are trying to calculate is not a 'clean' rectangle. An acre = 43,560 square feet or 4,840 squre yards. To calculate a rectangular area, multiply the length (in feet) by the width (in feet) and then divide the answer by 43560. This will tell you the area in acres.
If that's 40 x 60 feet, it's 2400 square feet. If that's 40 x 60 inches, it's 16 and 2/3 square feet.
area = pi * r2 area = 3.1416 * (100 ft)2 area = 31,416 ft2
Area 60X130=780 780feet^2 There are 780 square feet in 60X130
figure 1 is a5 centimeter squre. from 2-cenimeter, squrare are rwevmoed from each of the four coners of figure 1. what is the area of the remainder of figure 1as shown in figure 2