Please help thank you so much
1 answer:
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Answer:
False
True
False
False
Step-by-step explanation:
1. We have to get the sum as follows :
=
=
=
=
So, this is false.
2. We have to get the sum as follows :
=
=
=
=
So, this is true.
3. We have to get the difference as follows :
=
=
=
=
So, this is false.
4. We have to get the difference as follows :
=
=
=
=
So, this is also false. (Answer)
Surface area of cylinder is given by area of circle + area of the rectangle that curved around the cylinder
Area of the base of the cylinder =
Area of the cylinder 'wall' = width × length =
×
=×
=
Note that the wall of the cylinder is in the shape of a rectangle. The width of the rectangle is the height of the cylinder. The length of the rectangle is the circumference of the circle base.
Surface area of cone is given by
where 
is the slanted height of the cone
SA of cone =
Hence total painted surface area is
Area of the base of the cylinder =
Area of the cylinder 'wall' = width × length =
Note that the wall of the cylinder is in the shape of a rectangle. The width of the rectangle is the height of the cylinder. The length of the rectangle is the circumference of the circle base.
Surface area of cone is given by
SA of cone =
Hence total painted surface area is