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07-01-2016
Physics

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A school custodian waxed a gymnasium floor that measured 20 feet by 20 feet. How many square feet did she have to wax?
A. 40 square feet
B. 800 square feet
C. 80 square feet
D. 400 square feet

Respuesta :

13-05-2017

We have to calculate how many square feet a school custodian has to wax and to choose the correct answer. A gymnasium floor is in the shape of the square ( 20 by 20 feet ). The area of the square is : A = L^2. For L = 20 ft, A = 20^2 = 20 * 20 = 400 ft^2. Answer: D. 400 square feet.

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