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mylen [45]
3 years ago
9

The formula for the surface area of a cylinder is A=2πr(r+h).Find h if A=80π and r=5.

Mathematics
1 answer:
lesya [120]3 years ago
3 0
A=2<span>πr(r+h)
</span>80π=<span>2π(5)(5+h)
</span>80π=10π(5+h)
80π=50π + 10πh
30π=10πh
3=h
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Answer:

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Step-by-step explanation:

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_____

<em>Comment on the solution</em>

You will note that finding the value of the variable involved arithmetic with negative numbers. If you want the numbers to stay positive, then you can choose the variable to represent <em>the most expensive</em> of the items: the number of pounds of apples.

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