Problema Solution
If the sides of a square are lengthened by 5 cm, the area become 81 cm ^2. Find the length of both side of the original square. The length of a side of the original square is?
Answer provided by our tutors
Let original side of square = x cm
New side = x+5 cm
new Area = (x+5)^2 = 81
x+5 = 9
x = 9-5 = 4 cm = Original side