Someone please please help me with these last five problems..
Stacey Warren - Expert brainly.com
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the first one find the surface area and volume of a larger solid.
and the other 2 pictures for all four, find the surface area and volume of a larger solid.
In each one solve for the surface area or volume of the object - ex. for your first one the surface area is 48*pi right? The surface area of a cylinder is 2*pi*r*h=48*pi.
Now replace each of the dimensions by the scaling factor times itself --> r=2/3r and h=2/3h.
Then all you need to do is rearrange until you get the original (2*pi*r*h) equation back and the right side is the answer.
Whoa oops that's wrong, you need to add the top and bottom of the cylinder as well.
Same from there on though.
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for the first pic. i got the SA=108pi cm^2 and volume 1215pi/8 cm^3
SA is right you should check your second though - \[45\pi=\pi*r^2*h=\pi*(2/3)^2*r*2/3*h=2/3^3*\pi*r^2*h\]
so then solve to get the original equation back and you get 45*27/8 which is some fraction around 150 I don't have a calculator on me