Answer:
17.889 ; 21.909 ; 22.47%
Explanation:
Given that:
Initial area of square garage = 320ft²
Since the garage is a square, the sides are all equal;
Area of square = s² ; where s = side length
320 = s²
√320 = √s²
17.889 = s
Original length of 1 side of the garage = 17.889 ft
With a 50% increase ;
New area = (100 + 50)% * initial area
New area = 150% * 320
New area = 480ft²
Length of one side of New garage :
480 = s²
√480 = √s²
21.909 = s
% increase in length ;
((New length - old length) / old length) * 100%
((21.909 - 17.889) / 17.889) * 100%
(4.02/17.889) * 100%
= 22.47%