Answer:
it will cost 8.28
Step-by-step explanation:
ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ
l = (S/pi)-r^2
Just rearrange the equation.
S = pi*l + pi * r^2
S-pi*r^2 = pi*l
l = (S-pi*r^2)/pi