Question

if the area of circle increased by 125% then hiw much percent will radius increase?​

Answer 1

Step-by-step explanation:

A1 increased by 125% of A

A1 =( 1+125%)A = (1+1.25)A = 2.25A

pi r1² = 2.25 pi r²

pi r1² = pi ×(1.5r)²

r1 = 1.5r

%increase in radius = r1-r/ r ×100 = 1.5r-r/r ×100

= 0.5 ×100 = 50%