Question

please answer this question​

Answer 1

Answer:

Step-by-step explanation:

Answer is

Answer 2

Volume of cylinder V = ∏r^2h
h = 4cm, ∏ = 22/7
Surface area of cylinder = 2∏r(r+h)
176 = 2*22/7*r(r+4)
176 = (44/7)r(4+r)
Multiple to each side by 7.
1232 = 44r(4+r)
Multiple to each side by 44.
28 = 4r+r^2
Subtract 28 from each side.
r^2+4r-28 = 0
r = [-4±√(16+112)]/2
r = [-4±√128]/2
r = [-4±11.31]/2
r = [-4+11.31]/2 and r = [-4-11.32]/2
r = 3.65 and r = -7.66
Circle is base of cylinder.
Radius of circle = 3.65 cm
Volume of cylinder v = ∏r^2h
V = 22/7*13.69*4
V = 172.10cm^3