The heigh of a cylinder is equal to its diameter, and the volume is 99. Find surface area

volume of cylinder = PI*R^2*H
99 = 2PI*R^3
R = 2.507
H = 5.014
Area (if closed) = 2*PI*2.507*7.521 =
118.47

99 = pir^2 *2r = 2pir^3
r = [99/(2pi)]^1/3 = approx 2.5
Surface area = 2pir^2 + 2pir^3 = 2pir^2(1 + r)
So stick 2.5 for r in the above equation and ypu'll have your answer

h= diameter

volume of cylinder = (pi)r^2H r=d/2 and h = d

99 = (pi)(d/2)^2d
99=(pi)d^3/(4)

d=5.01

h =d= 2r

Surface Area of a cylinder = 2 pi r (h +r)
= 2 pi r (3r)
= 6 pi (2.507)^2 = 118.5 units^2

V = pi r^2 (2r) = 2 pi r^3
cube root 99/ 2pi = r
r = 2.507