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

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

Answer 2

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