High School

### Did You Hear About...

Complete each exercise. Find the answer in the answer column. Write the word under the answer in the box containing the exercise letter.

[tex]
\[
\begin{array}{|c|c|c|c|c|c|}
\hline
A & B & C & D & E & F \\
\hline
o. & H & I & J & K & L \\
\hline
M & N & & & & \\
\hline
\end{array}
\]
[/tex]

[tex]
\[
\begin{array}{|c|}
\hline
63.4 \, \text{cm}^3 \quad \text{BECAUSE} \\
\hline
254.9 \, \text{in.} \quad \text{SO} \\
\hline
128.4 \, \text{cm} \quad \text{SEA} \\
\hline
731.7 \, \text{fl}^3 \quad \text{SAILORS} \\
\hline
85.9 \, \text{ft} \quad \text{SHIP} \\
\hline
543.5 \, \text{cm}^3 \quad \text{CARDS} \\
\hline
22 \, \text{in.} \quad \text{THE} \\
\hline
2792.2 \, \text{m}^2 \quad \text{COULDN'T} \\
\hline
435.7 \, \text{m}^2 \quad \text{HAD} \\
\hline
533.8 \, \text{n}^1 \quad \text{WAS} \\
\hline
28 \quad \text{ON} \\
\hline
\end{array}
\]
[/tex]

#### Find the volume of the cylinder. Round your answer to the nearest tenth.

- **A.** [tex]r = 12 \, \text{in} ; h = 4 \, \text{in}[/tex]
- **B.** [tex]r = 6 \, \text{ft} ; h = 7 \, \text{ft}[/tex]
- **C.** [tex]r = 3 \, \text{cm} ; h = 13 \, \text{cm}[/tex]
- **D.** [tex]r = 9 \, \text{m} ; h = 11 \, \text{m}[/tex]
- **E.** [tex]r = 8 \, \text{ft} ; h = 15 \, \text{ft}[/tex]
- **F.** [tex]d = 10 \, \text{cm} ; h = 7 \, \text{cm}[/tex]
- **G.** [tex]d = 3 \, \text{cm} ; h = 9 \, \text{cm}[/tex]
- **H.** [tex]d = 8 \, \text{ft} ; h = 15 \, \text{ft}[/tex]
- **I.** [tex]d = 14 \, \text{m} ; h = 15 \, \text{m}[/tex]
- **J.** [tex]d = 6 \, \text{ft} ; h = 21 \, \text{ft}[/tex]

#### Find the missing dimension of the cylinder. Round your answer to the nearest whole number.

- **K.** An official NHL hockey puck is shaped like a cylinder with a diameter of 3 inches and a volume of 7.1 cubic inches. What is the height of the hockey puck?
- **L.** A water trampoline is shaped like a cylinder with a diameter of 11 feet and a volume of 190.1 cubic feet. What is the height of the trampoline?
- **M.** A rolled-up sleeping bag is shaped like a cylinder with a radius of 5 inches and a volume of 1727.9 cubic inches. What is the height of the rolled-up sleeping bag?
- **N.** A sports bottle is shaped like a cylinder with a height of 19 centimeters and a volume of 731.2 cubic centimeters. What is the diameter of the sports bottle?

[tex]
\[
\begin{array}{|c|}
\hline
7 \, \text{cm} \quad \text{DECK} \\
\hline
74.0 \pi \quad \text{THE} \\
\hline
3045.9 \, \text{ft}^3 \quad \text{PLAY} \\
\hline
1 \, \text{in} \quad \text{STANDING} \\
\hline
65.7 \, \text{ft}^3 \quad \text{SITTING} \\
\hline
529.8 \, \text{in} \quad \text{BOAT} \\
\hline
2309.1 \, \text{m}^3 \quad \text{CAPTAIN} \\
\hline
99.8 \, \text{in}^3 \quad \text{WASN'T} \\
\hline
1809.8 \, \text{in}^2 \quad \text{THE} \\
\hline
367.5 \, \text{cm}^3 \quad \text{WHO} \\
\hline
131.4 \, \text{in} \quad \text{ARE} \\
\hline
\end{array}
\]
[/tex]

Answer :

Sure, let's go through how to solve each part of the problem step-by-step.

### Volume of Cylinders

The volume [tex]\( V \)[/tex] of a cylinder can be calculated using the formula:
[tex]\[ V = \pi r^2 h \][/tex]
where [tex]\( r \)[/tex] is the radius and [tex]\( h \)[/tex] is the height of the cylinder.

#### Part A:
- Given: [tex]\( r = 12 \)[/tex] inches, [tex]\( h = 4 \)[/tex] inches
- Calculation:
[tex]\[ V = \pi \times 12^2 \times 4 \][/tex]
[tex]\[ V \approx 1809.6 \, \text{cubic inches} \][/tex]

#### Part B:
- Given: [tex]\( r = 6 \)[/tex] feet, height uses the result from Part A as [tex]\( h = 1809.6 \)[/tex]
- Calculation:
[tex]\[ V = \pi \times 6^2 \times 1809.6 \][/tex]
[tex]\[ V = 204660.9 \, \text{cubic feet} \][/tex]

#### Part C:
- Given: [tex]\( r = 3 \)[/tex] cm, [tex]\( h = 13 \)[/tex] cm
- Calculation:
[tex]\[ V = \pi \times 3^2 \times 13 \][/tex]
[tex]\[ V \approx 367.6 \, \text{cubic centimeters} \][/tex]

#### Part D:
- Given: [tex]\( r = 9 \)[/tex] m, [tex]\( h = 11 \)[/tex] m
- Calculation:
[tex]\[ V = \pi \times 9^2 \times 11 \][/tex]
[tex]\[ V \approx 2799.2 \, \text{cubic meters} \][/tex]

#### Part E:
- Given: [tex]\( r = 8 \)[/tex] ft, [tex]\( h = 15 \)[/tex] ft
- Calculation:
[tex]\[ V = \pi \times 8^2 \times 15 \][/tex]
[tex]\[ V \approx 3015.9 \, \text{cubic feet} \][/tex]

#### Part F:
- Given: [tex]\( d = 10 \)[/tex] cm, [tex]\( h = 7 \)[/tex] cm
- Calculate radius [tex]\( r = \frac{d}{2} = 5 \)[/tex] cm
- Calculation:
[tex]\[ V = \pi \times 5^2 \times 7 \][/tex]
[tex]\[ V \approx 549.8 \, \text{cubic centimeters} \][/tex]

#### Part G:
- Given: [tex]\( d = 3 \)[/tex] cm, [tex]\( h = 9 \)[/tex] cm
- Calculate radius [tex]\( r = \frac{d}{2} = 1.5 \)[/tex] cm
- Calculation:
[tex]\[ V = \pi \times 1.5^2 \times 9 \][/tex]
[tex]\[ V \approx 63.6 \, \text{cubic centimeters} \][/tex]

#### Part H:
- Given: [tex]\( d = 8 \)[/tex] ft, [tex]\( h = 15 \)[/tex] ft
- Calculate radius [tex]\( r = \frac{d}{2} = 4 \)[/tex] ft
- Calculation:
[tex]\[ V = \pi \times 4^2 \times 15 \][/tex]
[tex]\[ V \approx 754.0 \, \text{cubic feet} \][/tex]

#### Part I:
- Given: [tex]\( d = 14 \)[/tex] m, [tex]\( h = 15 \)[/tex] m
- Calculate radius [tex]\( r = \frac{d}{2} = 7 \)[/tex] m
- Calculation:
[tex]\[ V = \pi \times 7^2 \times 15 \][/tex]
[tex]\[ V \approx 2309.1 \, \text{cubic meters} \][/tex]

#### Part J:
- Given: [tex]\( d = 6 \)[/tex] ft, [tex]\( h = 21 \)[/tex] ft
- Calculate radius [tex]\( r = \frac{d}{2} = 3 \)[/tex] ft
- Calculation:
[tex]\[ V = \pi \times 3^2 \times 21 \][/tex]
[tex]\[ V \approx 593.8 \, \text{cubic feet} \][/tex]

### Finding Missing Dimensions

To find a missing height or diameter, rearrange the volume formula to solve for the unknown.

#### Part K:
- Given: [tex]\( d = 3 \)[/tex] in, [tex]\( V = 7.1 \)[/tex] cubic inches
- Calculate radius [tex]\( r = \frac{d}{2} = 1.5 \)[/tex] in
- Finding height [tex]\( h \)[/tex]:
[tex]\[ h = \frac{7.1}{\pi \times 1.5^2} \][/tex]
[tex]\[ h \approx 1 \, \text{inch} \][/tex]

#### Part L:
- Given: [tex]\( d = 11 \)[/tex] ft, [tex]\( V = 190.1 \)[/tex] cubic feet
- Calculate radius [tex]\( r = \frac{d}{2} = 5.5 \)[/tex] ft
- Finding height [tex]\( h \)[/tex]:
[tex]\[ h = \frac{190.1}{\pi \times 5.5^2} \][/tex]
[tex]\[ h \approx 2 \, \text{feet} \][/tex]

#### Part M:
- Given: [tex]\( r = 5 \)[/tex] in, [tex]\( V = 1727.9 \)[/tex] cubic inches
- Finding height [tex]\( h \)[/tex]:
[tex]\[ h = \frac{1727.9}{\pi \times 5^2} \][/tex]
[tex]\[ h \approx 22 \, \text{inches} \][/tex]

#### Part N:
- Given: [tex]\( h = 19 \)[/tex] cm, [tex]\( V = 731.2 \)[/tex] cubic centimeters
- Using radius squared formula
[tex]\[ \pi r^2 = \frac{731.2}{19} \][/tex]
- Finding diameter [tex]\( d \)[/tex]:
[tex]\[ d = 2 \sqrt{\frac{731.2}{\pi \times 19}} \][/tex]
[tex]\[ d \approx 7 \, \text{centimeters} \][/tex]

These steps should help you solve problems involving the calculation of volumes and dimensions of cylinders.

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