A rectangle is dilated by a factor of 1/5. The area of the new rectangle is 4 square yards. What could be the dimensions of the
original rectangle?
10 yards by 10 yards
4 yards by 5 yards
25 yards by 25 yards
5 yards by 2 yards

 The original could have been 10 yards by 10 yards

Step-by-step explanation:

If the new rectangle is 4 square yards, its sides could be 2 by 2 or 1 by 4.

If the original was dialated by 1/5, multiple the dimensions by the reciprocal, 5, to find the original dimensions.

2 × 5 = 10        1 × 5 = 5    4 × 5 = 20

5 yards by 20 yards is not an option given, but  10 yards by 10 yards is possible. None of the other options will work (test by dividing  n/5)

Maybe tricky-- but a square is a rectangle with all sides equal.

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