Please help!!!! I do not know how to resolve this.
1 answer:
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Answer:
Step-by-step explanation:
we know that
The <u><em>Cavalieri's principle</em></u> states that if two solids are of equal height and the sections "matching" equal areas everywhere along the height, the solids have the same volume.
The surface area of the stack is given by the formula
where
B is the area of the base
LA is the lateral area
The lateral area of the stack, using Cavalieri's Principle, is equal to the lateral area of one CD multiplied by the total number of CDs of the stack
so
Find the radius of CD
Remember that the circumference is given by the formula
we have
substitute
solve for r
Find the area of CD
substitute
therefore
The surface area of the stack is equal to