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anonymous
 5 years ago
Volume= 18 cm3
Height of the pyramid= 3 cm
B1= 2 cm
B2= 3 cm
What is the height of the base?
anonymous
 5 years ago
Volume= 18 cm3 Height of the pyramid= 3 cm B1= 2 cm B2= 3 cm What is the height of the base?

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0you mean area of the base?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0wait, no. base area is .5xh(b1+b2) so i need the height

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i though height was given as 3 cm?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0thats the height of the pyramid

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0okay, and what do you need to evaluate?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0the height of the base

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0http://en.wikipedia.org/wiki/Pyramid_(geometry) are you talking about that? how is there a height of the base?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ah, so you should say its a trapezoidal pyramid.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0okay, do you know the formula to the volume of a pyramid?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0what is B in the formula?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i dont know. b1 = 2 cm b2= 3 cm

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0okay you must always know what the letters mean in a formula. for example the area of a rectangle is the its length multiplied by its width. you shouldn't remember it as l x b, because when I ask you what l and b are, you don't have an answer to that.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0volume of a pyramid is onethirds the product of the base area and its height

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so B is the area of the base. right, so substitute H and V in the equation

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0soooo,,,,,,,,,,,,,,,,,,,,

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so, tell me what you got after substituting the values of V and H.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0V= 18cm H= 3cm. h= i dont know

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0substitute V = 18, H =3 in V = 1/3 x B x H and find the value of B.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0but H is the height of the pyramid, i need the height of the base (h)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Yes, volume of a pyramid is 1/3 x Base area x Height of the pyramid. so once you find the base area of the pyramid, substitute its value as 1/2(b1+b2) x h and find h

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so how do you find h?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I just told you. can you please just for the love of god substitute V and H in V = 1/3 B x H and give me an answer for B?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0BUT I DONT KNOW THE BASE. sorry i'm not good at math, my lord.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0what is so hard about this? 18 = 1/3 x B x 3 B =18 but we know that B = 1/2(b1+b2) x h so 18 = 1/2(2+3) x h h = 36/5

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0you just have to work backward to get the base. you won't always find equations in the correct order. you must know how to manipulate equations to get your variable.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0multiply 18 by 2 and divide by 5.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i got h = 7.2. is this correct?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0yeah. oooo you used a calculator to find the value of 36/5! good on you!

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0btw, which grade are you in?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0okay. Have you ever done manipulation of equations?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0like if x = y+2, what is y?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0then why do you say you haven't done any algebraic manipulation before?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0btw, h= 2.4. 1/2 x 2.4 (3+2) = 6. 6x3=18.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0why do you say 6 x 3 = 18?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0is the formula for volume of a pyramid area of base x height?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0because the height of the pyramid is 3 cm, so to find the volume you have to multiply the base by the height.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0oh yeah, divide by 3. nevermind...

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0good, at least you figured that out on your own.
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