Explanation: The equation for surface area of a cylinder is; a=2pirh+2pir^2 So a=2 x pi x 3 x 10 + 2 x pi x 3^2 Then follow order of operations, so start with exponent So a= 2 x pi x 3 x 10 + 2 x pi x 9 Then multiplication, but leave pi since out answer will be in pi
So a = 2 x pi x 30 + 2 x pi x 9 Next multiply 2 x 30 and 2x9 a= pi x 60 + 18 Add a= 78 pi
