Need help with these geometry questions
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Need help with these geometry questions

[From: ] [author: ] [Date: 11-10-11] [Hit: ]
265.16.......
1) the volume of a right circular cylinder is 586 cubic centimeters and the height of the cylinder is 4.6 centimeters. what is the radius of the base to the nearest tenth?

2)a circular cylinder has a base with a radius of 7.5 centimeters and a height of 12 centimeters. a rectangular prism has a square base and a height of 8.0 centimeters. if the cylinder and the prism have equal volumes, what is the length of the base of the prism to the nearest tenth

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586=4.6(πr^2)
586=400r^2
1.465=r^2
r≈1.2

v=π(7.5^2)(12)
v=2120.57
2120.57=8b^2
265.1=b^2
16.3=b
1
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