# ACT Math 3.5 Plane Geometry

ACT Math: Plane Geometry Drill 3, Problem 5. How long would it take for the wheel to make two rotations?

ACT Math | Plane Geometry |

ACT Mathematics | Plane Geometry |

Coordinate Geometry | Conics |

Foreign Language | Arabic Subtitled Chinese Subtitled Korean Subtitled Spanish Subtitled |

Language | English Language |

Math | Geometry |

Plane Geometry | Plane figures (triangles, rectangles, parallelograms, trapezoids, circles, polygons) |

Product Type | ACT Math |

### Transcript

Something is to something as something else is to something else.

Key things to note: 1 full rotation is 360 degrees...

...so two rotations is 720 degrees...

...480 degrees is 2 minutes or...

...120 seconds as 720 degrees is to what?

So in this case we can just cross multiply here

and we take 480 time x equal 720 times 120.

So the base equation is 480X equals 86400.

Now divide both sides by 480 and get X equals 180 seconds.

That's x equals 180 divided by 60 seconds which is

3 minutes. Looks like C is our answer.