SAT Math 9.5 Geometry and Measurement

SAT Math 9.5 Geometry and Measurement

Additional Topics in MathCircle theorems
Area and VolumeArea
Basic GeometryArea and Volume
Geometry3D Geometry
Area and Volume
LanguageEnglish Language
Product TypeSAT Math
SAT MathGeometry and Measurement
Solid GeometrySolid Figures and Volumes

Transcript

00:22

Here are the potential answers...

00:27

We’re not sure what we did to deserve this cruel and unusual punishment…

00:30

…but we must have done SOMETHING to be charged with this community service project.

00:34

This one’s pretty simple…all we need is to know the formula for the surface area of a cylinder.

00:39

The formula in question is 2 pi r squared plus length times pi 2r…

00:45

…then we can just plug in our radius of 4.5 and our length of 10.

00:49

We need to now see what our calculator has to say about it.

00:52

It comes out to 409.77.

00:55

We know that one can of paint will cover 20 square feet…

00:58

…so we take 409.77 and divide it by 20 to get 20 point…something.

01:04

Doesn’t really matter what comes after the decimal point, because we’re going to have to round up…

01:08

...we need a whole other can of paint. Right?

01:10

The answer is 21 cans and that's choice B…and we’re done.