The area of a square would increase by 25 ft 2 if we increased its side by 1 ft. How long is a side of the square now (before the increase)?

Answer 1

Area is now 12^2 = 144 ft^2 with each side now = 12 feet

increase the sides by 1 means they're then 13 ft each

13^2 = 169 ft^2 = the Area after the sides increase by 1

169-144 = 25 ft^2 increase in Area

Answer 2

Asked and answered.