Question

Find the surface area of a cylinder with a diameter of 10 and a height of 45. Use 3.14 for pie. Round your answer to the nearest tenth.
A) 1575
B) 1573
C) 1570
D) 1569

Answer 1

Area = 2(Pi)rh + 2(Pi)r^2
r = 5
h = 45
Pi = 3.14

2(3.14)(5)(45) + 2(3.14)(25)
1413 + 157 = 1570

Answer: C

Answer 2

A=2$\pi$rh+2$\pi$$r^{2}$=2*$\pi$*5*45+2*$\pi$*$5^{2}$≈1.57079633
The answer is C) 1570