Question

Solve for Height by Volume?

Answer 1

The Volume of this pyramid is 120, what is it's height?

Answer 2

ANYONE?

Answer 3

Please, I need to know how to do this.

Answer 4

Sorry I thought I knew, Im sure someone will help soon They are good at getting to people.

Answer 5

Thanks for trying!

Answer 6

@mathmath333

Answer 7

@vishweshshrimali5

Answer 8

A=(1/2)hb

Answer 9

Okay, how do I make that work for this problem?

Answer 10

Basically... you can relate volume and height by simple formula:

Volume = Area of base * Height...

Answer 11

...don't laugh but how do I figure out area of base?

Answer 12

12X5 divides by 2 I believe

Answer 13

Don't worry I am not laughing... :) See in base you have a right angled triangle.. what is it's area? Recall the formula..

Area of triangle = 1/2 * base *height

Answer 14

Can you calculate the area of this triangle ?

Answer 15

30?

Answer 16

Great!!

Answer 17

Now, recall the formula:

Volume = Area * Height

You want to find Height / Volume

So, that would be?

Height / Volume = 1/ Area

You calculated area to be 30... so what would be the answer?

Answer 18

Um, 120/30 = 40?

Answer 19

Good.. so height would be 40 :)

Answer 20

Thanks so much!!!!

Answer 21

No sorry... that would be 4 :D

Answer 22

120/30 = 4 not 40

Answer 23

how so? Also, thats not on my list of answers but 40 is

Answer 24

Can you recheck that volume was 1200 or 120 ?

Answer 25

120

Answer 26

Then there must be some mistake in the question...

See..volume = 120 and area = 30

So, 120 divided by 30 is 4 not 40... so height should be 4...

Answer 27

oh boy. this happens alot, let me screenshot my choices

Answer 28

The answer would be 40 only if volume is 1200... we calculated the area perfectly..

Answer 29

Oh boy, I'll ask my teacher but for now I'll go with 40. IN these situations it's best to go with something close. (Online school problems.) Thanks so much for your helo though! Hold on a sec I'll tell you if I got it right.

Answer 30

(y) Sure

Answer 31

Nope, they wanted 12.........

Answer 32

I'll ask my teacher. Thanks though! Have a great night!

Answer 33

:) Same to you