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Teachers & SchoolsGED Math 5.5 Measurement. What is the approximate radius of the cone?

3D Geometry | Area and Volume Surface Area |

Area and Volume | Area Volume |

GED Math | Measurement |

Geometry | 3D Geometry Area and Volume |

Language | English Language |

Skill Area 2 | Measurement (Quantitative) |

the approximate radius of the cone A horrible question That

and here the potential answers Well another formula question coming

right at you So those questions looking for the radius

of the cone but really we need to work backwards

and figure out how someone might arrive it this volume

Well we've got the height of the cone and the

volume so let's blood those into our cone volume formula

which is volume equals one third pi r squared times

type that's the formula Well you know what we know

We get a thousand five point Three cubic feet equals

one thirds pi r squared times fifteen And the radius

of the peace we're looking for is we need to

isolate it And isolation can be good Go to your

happy place part So let's Just multiply both sides by

three to get rid of the one third that gives

Us three thousand fifteen point nine equals pi r squared

times fifteen Great now let's Divide both sides by fifteen

pie and we get three thousand fifteen point nine over

fifteen pie with peoples are squared well now before we

go any further we kind of need to deal with

this mess on the left hand side so let's see

what our calculators can do with it Fifteen pies right

around forty seven point one two and note that the

question did ask for an approximate value so we don't

have to be exactly pot here Well we have three

thousand fifteen point nine divided by about forty seven point

one two and it's roughly sixty four almost on the

dot Actually the last step We take the square root

of both sides and our equals broke a six four

which is eight Answer b Now we just have to

look into our happy place on the mountain and see 00:01:54.232 --> [endTime] if we came up with the same