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  1. #1
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    :Smack:

    I'm havin' sum trouble. see attachments, i really don't know how to do them.

    Questions: Calculate the volume of each shape. Show all Workin'
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  2. #2
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    For the first one just use the formula \frac{1}{3}bh and for the second try breaking it into two rectangular prisms find the area of each of them and add them together.
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  3. #3
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    yer i know this would be pretty easy for you but i'm not sure what formula to use!
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  4. #4
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    how exactly do i do the 1/3bh formula??
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    Quote Originally Posted by Sah-raa View Post
    how exactly do i do the 1/3bh formula??
    the formula for volume is: V = \frac 13 (\mbox{ Area of base })(\mbox { height })

    the base in the first question is a square. you do know how to find the area of a square, right?
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    Quote Originally Posted by Sah-raa View Post
    I'm havin' sum trouble. see attachments, i really don't know how to do them.

    Questions: Calculate the volume of each shape. Show all Workin'
    for maths5

    alter the diagram as you see below. now find the volume of each box, that is V = length*width*height (note that the height of the big block is 7cm
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    Quote Originally Posted by Sah-raa View Post
    yer i know this would be pretty easy for you but i'm not sure what formula to use!
    for math6. i suppose you want to find the area. modify the diagram as you see below and find the area of each rectangle. for a rectangle, A = length*width
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  8. #8
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    to find the area of a square it would be length x width right?
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  9. #9
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    for the 2nd one, how do you know the the height for the larger one is 7 cm?
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    Quote Originally Posted by Sah-raa View Post
    to find the area of a square it would be length x width right?
    yes
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  11. #11
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    Oh yer i have it, so with that info, i've got this: v = length x width x height
    = 7 x 12 x 20 x 12 x 20 x 7 x 12
    is that right, please tell me if i'm gettin' something wrong!
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  12. #12
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    Quote Originally Posted by Sah-raa View Post
    for the 2nd one, how do you know the the height for the larger one is 7 cm?
    the length of the big block above the small block is 4 cm, the small block is 3 cm high. so the height of the big block is 3 + 4 = 7cm high

    Quote Originally Posted by Sah-raa View Post
    Oh yer i have it, so with that info, i've got this: v = length x width x height
    = 7 x 12 x 20 x 12 x 20 x 7 x 12
    is that right, please tell me if i'm gettin' something wrong!
    what question is that for? anyway, it doesn't matter, that is almost certainly wrong. i don't think any of the problems should be worked out like that. in your formula you have 3 things being multiplied, yet you have 6 multiplication signs, that should tell you that you're doing something wrong
    Last edited by ThePerfectHacker; October 8th 2007 at 04:59 PM.
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  13. #13
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    ok so would it be 7 x the length of the larger one? how will i be able to find the length?
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  14. #14
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    Calculate the value of AC correct to one decimal place. All measurements are in centimetres.

    for the first one, would i go 15 x 12? to find the value of AC? and the same as the snd?
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    Quote Originally Posted by Sah-raa View Post
    Calculate the value of AC correct to one decimal place. All measurements are in centimetres.

    for the first one, would i go 15 x 12? to find the value of AC? and the same as the snd?
    i do not know what question you are referring to here. you asked two questions on volume and one on area, where is this from?
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