Respuesta :

emskybaby3223
so 4*9=36 then you multiply by pi which is 36*3.14=113.04 and then you round it and you will find your answer
fussellk
Use the formula:
A = 2 x pi x r x h + 2 x pi x r^2
=2 x 3.14 x 4 x 9 + 2 x 3.14 x 4^2
=326.6