## Grade 8 Math Worksheets

### Volume of Cone

**Volume of cone =**** **h, where = 3.14 or

*Example: ***Find the volume of a cone with radius 2 cm and height 7 cm. (Round the answer to nearest hundredth place)**

**Solution: **Volume of cone = h=7== **29.31 cm ^{3}**

### Volume of Cylinder

**Volume of cylinder **= h, where = 3.14 or ** .**

*Example: ***Find the volume of a cylinder with diameter 4 feet and height 7 feet. (Use = )**

**Solution:** Volume of cylinder =h=7=224= **88 ft ^{3}**

### Volume of Sphere

**Volume of sphere =** , where = 3.14 or** .**

*Example: *Linda purchased a spherical aquarium of diameter 70 cm. What is the volume of aquarium? (Use = )

Volume of sphere** =** **= =25666.67 cm ^{3} **

**Check Point**

- What is the capacity of a silo (silo is a large cylindrical vessel for storing bulk materials) with height 90 ft and diameter 30 ft? (Use = 3.14)
- Find the volume of an ice cream cone with radius 5 cm and a height of 12 cm. (Use = 3.14)
- What is the volume of water tank with a diameter of 4 feet and height 6 ft (Use = 3.14)
- What is the volume of cone with diameter of 2 mi and a height of 12 mi? (Use = 3.14 and round the answer to nearest tenth)
- What is the volume of a spherical ball with radius 10 cm? (Use = 3.14)

##### Answer key

- 63,585 ft
^{3} - 314 cm
^{3} - 75.36 ft
^{3} - 12.6 mi
^{3} - 3,140 cm
^{3}

## Personalized Online Tutoring

eTutorWorld offers affordable one-on-one live tutoring over the web for Grades 2-12, Test Prep help for Standardized tests like SCAT, CogAT, SSAT, SAT, ACT, ISEE and AP. You may schedule online tutoring lessons at your personal scheduled times, all with a Money-Back Guarantee. The first one-on-one online tutoring lesson is always FREE, no purchase obligation, no credit card required.

For answers/solutions to any question or to learn concepts, take a **FREE Demo Session**.

*No credit card required, no obligation to purchase. *

*Just schedule a FREE Sessions to meet a tutor and get help on any topic you want!*

Learn more about Scientific Method and other important topics with 7th Grade Science Tutoring at eTutorWorld. Our expert science tutors break down the topics through interactive one-to-one sessions. We also offer the advantage of customized lesson plans, flexible schedules and convenience of learning from home.

## Pricing for Online Tutoring

Tutoring Package | Validity | Grade (1-12), College |
---|---|---|

5 sessions | 1 Month | $124 |

1 session | 1 Month | $25 |

10 sessions | 3 months | $239 |

15 sessions | 3 months | $354 |

20 sessions | 4 months | $449 |

50 sessions | 6 months | $1049 |

100 sessions | 12 months | $2049 |