Question

Area of square decrease by 19% find decrease in its side

Answer 1

Answer:

10%

Step-by-step explanation:

let area of square is A and

after decrease by 19 %

area of square is 0.81 A

let S be the side of square

area of square = ( side of square )^2

A = S^2

S=√A

after decrease by 19 %

0.81 A = S'^2

S' = 0.9 √A

decrease in side = S - S'

decrease in side = √A - 0.9√A

decrease in side = 0.1√A

decrease in side by 10%