anonymous
  • anonymous
5. Find the volume of the composite space figure to the nearest whole number. (1 point) 416 mm3 705 mm3 1,294 mm3 944 mm3
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
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anonymous
  • anonymous
@hairynmad
anonymous
  • anonymous
Find two separate volumes. You have a rectangular prism and a half cylinder.

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anonymous
  • anonymous
formulas lol
anonymous
  • anonymous
Well, we just did the cylinder. Do the same as before and take half. For the rectangular prism. V=L*W*H or just multiply all sides
anonymous
  • anonymous
so i would do 6*9*11
anonymous
  • anonymous
witch in that case would be 594
anonymous
  • anonymous
Yes, that's just the volume for the rectangular prism. Now you'll have to find the volume for the half cylinder as well.
anonymous
  • anonymous
okay but no numbers are given for the base or hight of the half cylinder for me to find the volume
anonymous
  • anonymous
They are given. Just look.
anonymous
  • anonymous
what's V for cylinder again?
anonymous
  • anonymous
so base is 9 or 6 and height is 11
anonymous
  • anonymous
for a cylinder V= B*h
anonymous
  • anonymous
height is right, 11 base is wrong
anonymous
  • anonymous
base is not 9 or 6????
anonymous
  • anonymous
for the answer choices there is no pi in any of the answers.
anonymous
  • anonymous
No, remember B is area so in square units so mm^2, not just mm or one dimensional
anonymous
  • anonymous
but witch one would i use to square in order to get the base?? 9 or 6
anonymous
  • anonymous
pi is included inside the answer
anonymous
  • anonymous
neither try to find area of the base NOT a line!!
anonymous
  • anonymous
how would I do that????
anonymous
  • anonymous
you have half a cylinder so find the V like it's a full cylinder then to find the volume, take half of the full cylinder think of the base as a full circle
anonymous
  • anonymous
so i would times everything by 2 to get the full volume or wht
anonymous
  • anonymous
No, for cylinder the base is a circle find area of the circle
anonymous
  • anonymous
A=pi*r^2
anonymous
  • anonymous
to find area, you need?
anonymous
  • anonymous
okay but whats going to be the Radius in order to do that
anonymous
  • anonymous
Yes, you need the radius. Look at the picture.
anonymous
  • anonymous
It shows the diameter.
anonymous
  • anonymous
it would be half of 9 witch is 4.5
anonymous
  • anonymous
right, now find the area then the volume of the half cylinder then add V of half cylinder to V of rectangular prism and that's the answer
anonymous
  • anonymous
which if its 4.5 and you square that it would be 20.25pi
anonymous
  • anonymous
okay so the V of a rectagular prism is 594 and and the v of the half cylinder is 222.75 and i add that up it = to 816.75 witch is just 817 witch is not one of the choices
anonymous
  • anonymous
you miscalculated somewhere on the cylinder
anonymous
  • anonymous
I calculated the right answer. It's one of the choices.
anonymous
  • anonymous
i took 4.5^2 witch is 20.25 and that then becomes 20.25pi then i timed it by 11 and got 222.75
anonymous
  • anonymous
You did NOT account for half of the cylinder. You calculated it like it was a whole one. Take half of it.
anonymous
  • anonymous
so i have to divide the answer 222.75 by 2
anonymous
  • anonymous
Of course, it's not showing a full cylinder.
anonymous
  • anonymous
Vcyl=B*h B=pi*r^2=pi*4.5^2 h=11 Vrect=LWH=11*9*6 Total Volume=Vrect + 0.5*Vcyl

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