change centimeters into inches. 1 cm = 0.39 in. since you're calculating an area you'll get the result in inches squared!!!
11 cm x 4 cm = 4.29 in x 1.56 in = 6.69 inches squared
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11cm x 5cm = 55cm2.
11cm x 17.5cm = 192.5 square centimeters which is 29.837559675119 square inches.
what is the perimeter of a 11cm x 10cm rectangle answer 42
2 x ((11 x 4) + (11 x 3) + (4 x 3)) = 2 x (44 + 33 + 12) = 2 x 89 = 178 sqcm
The density is (its mass)/64 grams/cm3