If the sides of a square are lengthened by 7 feet, the area becomes 121 square feet. how long is a side of the original square?

The side of the original square is 4 feet.

Step-by-step explanation:

Given , the sides of the original square is lengthened by 7 feet.

The area of the new square = 121  square feet.

Let the original side of square be 'x'.

The new side = x+7

Area of new square =(side)² = (x+7)²

As per given , we have

Taking square roots on both sides , we get

Hence, the side of the original square is 4 feet.

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