Surface Area and Volume of Cylinders homework?

Question

Ok i need the volume and surface area of each one of these cylinders. First 11.5(height) by 6(width). Second 5.5 by 3. Third and last 110 by 60 Please and thanks

Answer 1

A= 2 π(r)h+4π(r²)
V=π(r²)h

1)11.5(height) by 6(width)
h= 11.5
r= 6/2 = 3

A= 2 π(3)(11.5)+4π(3)²
A=69π+36π
A=105π
A≈ 329.87

V=π3²(11.5)
V=103.5π
V≈ 325.15

Answer: A=105π, V=103.5π

2.) h=5.5 w=3
r=3/2= 1.5

A= 2 π(1.5)(5.5)+4π(1.5)²
A=16.5π+9π
A=25.5π
A≈ 80.11

V=π(1.5)²(5.5)
V=12.375π
V≈ 38.88

Answer: A=25.5π, V=12.375π

3)h=110 w=60
r=60/2 = 30

A= 2 π(30)(60)+4π(30)²
A=3600π+3600π
A=7200π
A≈ 22,619.47

V=π(30)²(110)
V=99,000π
V≈ 311,017.67

Answer: A=7200π, V=99,000π

Hope that was helpful! Best Answer?

Answer 2

Surface area includes the two bases and the side of the cylinder. SA = 2(pi)r^2 + 2(pi)rh your radius is (1/2)65 = 65/2mm and your h = 70mm Volume will be cubic so (pi)r^2 times h = volume.

Answer 3

Here are your Volume answers: Volume = pi x r2 x height
1. pi = 3.14159 r=3
3.14159 x 9 x 11.5 = 325.154565

2. 3.14159 x 2.25 x 5.5 = 38.87717625

3. 3.14159 x 900 x 110 = 311,017.41

Answer 4

i take it you mean diameter when you say WIDTH ?
also you need to know that it is a right circular cylinder - if so then see earlier answers, where d is diameter.
for surface area you need also to know whether the cylinder is CLOSED i.e. it has a lid and base or OPEN i.e. no lid or base

Answer 5

Sa = pi * d * height
Vol = pi d^2 /4 * height

you do the math

Answer 6

you need to know the radius of the base to find the answers!