# circular cylinder

## 042 Review Problem - Water is poured by tilting the glass

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## 028 Review Problem - Amount of metal sheet used to construct a water tank

**Problem 28**

A water tank, open at the top, consists of a right circular cylinder and a right circular cone, as shown. If the altitude of the cylinder is three times its radius, and the altitude of the cone is two times the same radius, find the number of square feet of sheet metal required to construct a tank having a capacity of 10,000 gal. (One gal. = 231 cu. in.)

## 003 Review Problem - Sphere melted into cylinder

**Problem 3**

Two spheres of lead, of radii 2 and 3 in., respectively, are melted into a cylinder of revolution of radius 1 in. Find the altitude of the cylinder.

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## 015 Two unequal balls inside the cylinder

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## 014 Water poured into a jar of marbles

**Example 014**

A boy who had discovered that 20 mm marbles fitted snugly into the bottom of a cylindrical jar, dropped in a fourth on top of the three and poured water enough into the jar to just cover them. How much water did he use?

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## 012 Sphere circumscribed about a right circular cylinder

**Example 012**

Find the volume and total area of the sphere which circumscribes a cylinder of revolution whose altitude and diameter are each 6 inches.

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## 03 - Heaviest cylinder that can be made from a shot

**Problem 3**

Find the weight of the heaviest circular cylinder can be cut from a 16-lb shot.

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## The Right Circular Cylinder

A right circular cylinder is a cylinder whose base is a circle and whose elements are perpendicular to its base.

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