Shaded part of the area of the rectangle equal to twenty-one squared. It is 3/4 of the entire area of the rectangle.
| January 3, 2021 | education
Shaded part of the area of the rectangle equal to twenty-one squared. It is 3/4 of the entire area of the rectangle. What is the area of the entire rectangle.
Find out the area of the filled part of the rectangle:
21² = 21 * 21 = 441.
Let’s calculate the area of the entire rectangle. Let us write it in the form of an equation, where x is the entire area of the rectangle.
3/4 * x = 441.
x = 441 ÷ 3/4.
x = 441 ÷ 3 * 4.
x = 588.
Answer: the area of the entire rectangle is 588.
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