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Svetllana [295]
3 years ago
9

Jack knows the surface area of a cylinder and its radius. He wants to find the cylinder's height. He needs to rewrite the formul

a A=2πr (r+h) to find the cylinder's height (h) in terms of the cylinder’s surface area (A) and its radius (r). Which is the correct formula?
a. h= r+ A/2πr
b. h= A/2πr
c. h= A/2πr-r^2
d. h= A/2πr-r
Mathematics
2 answers:
gizmo_the_mogwai [7]3 years ago
8 0

Answer:

The answer is the option D

h=\frac{A}{2\pi r} -r

Step-by-step explanation:

we know that

The formula to calculate the surface area of a cylinder is equal to

A=2\pi r(r+h)

where

A is the surface area of the cylinder

r is the radius of the cylinder

h is the height of the cylinder

Isolate the variable h

Divide by 2\pi r both sides

A/(2\pi r)=(r+h)

Subtract  r both sides

h=\frac{A}{2\pi r} -r

svetlana [45]3 years ago
5 0
A=2πr (r+h)
We divide both sides of equation by "2πr"
A/(2πr)=2πr (r+h) / (2πr)
A/(2πr)=r+h

r+h=A/(2πr)
We have to subtrac "r" both sides of the equation:
r+h-r=A/(2πr)-r
h=A/(2πr) - r

Answer: d.h=A/2πr-r

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