What is the area of the rectangle if one fourth is equal to 20 dm2?

Since 1/4 of the area of the rectangle is 20 dm2, then we will increase this part by exactly 4 times and get the value of the area of this rectangle:
20 dm2 * 4 = 80 dm2.
Answer: as a result, we got that this figure has an area equal to 80 dm2.

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