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GED Math 2.1 Measurement 219 Views


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Description:

GED Math 2.1 Measurement. How tall is the water tank?

Language:
English Language

Transcript

00:00

Thank you We sneak in and here's your smoke du

00:05

jour brought to you by water tanks Ifyou're not dunking

00:08

your teacher in one Well what good are they anyway

00:11

Alright a large cylindrical water tank has a radius of

00:14

two meters and a surface area of twenty eight high

00:17

meters So how tall is the water tank and here's

00:20

A potential answers Okay here we go Alright So suppose

00:27

we can't just ask it or look up its information

00:30

on it's like dating profile All right well we're gonna

00:35

have to use some kind of formula here And we're

00:37

told that the tank is a radius of two meters

00:40

and a service area Twenty eight pi square meters All

00:43

right well where do we go A formula for the

00:45

surface area of a cylinder is s a equals two

00:51

pi r squared plus two pi r h where s

00:56

a is surface area Are is the radius of a

00:58

cylinder And h is the height Got to be sure

01:02

you got those right All right well the first bit

01:04

this helps us find the area of the top and

01:06

bottom circles while this second part helps us find the

01:09

area of the rest of the cylinder Okay So now

01:12

let's plug in what we know in this formula twenty

01:14

eight pi that service area equals two pi times two

01:18

squared And since two is the radius plus two pi

01:21

times two times a jj equals eight pi plus four

01:27

pi times Cage mouthful Yeah It's a lot We can

01:31

simplify by combining Like terms and subtracting a high from

01:35

both sides to get twenty pi equals four pi h

01:40

Now divide both sides by pie will get rid of

01:42

that pie and we have a cheek ual's and that's

01:46

It that's our hype Answer b Well that one was 00:01:50.566 --> [endTime] a slam dunk

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