Glencoe Math: Course 3, Volume 2
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Glencoe Math: Course 3, Volume 2 View details
1. Volume of Cylinders
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Exercise 16 Page 595

Recall the formula for the volume of a cylinder and the formula for the volume of a rectangular prism.

The rectangular pan, see solution.

Practice makes perfect

We are asked to determine which of the given pans will hold more cake batter, the rectangular pan or two round pans. To do so, we need to find the volume of each pan. Let's start with the rectangular pan. Note that this pan is in the shape of a rectangular prism. Recall that the volume of a rectangular prism with length l, width w, and height h can be calculated using the following formula. V=l w h We are given that l= 9, w= 13, and h= 2, so we have enough information to calculate the volume of the rectangular prism.

V=l wh
V= 9( 13)( 2)
V=234
The volume of the rectangular pan is 234 cubic inches. Next, we will find the volume of the round pan. Notice that this pan is in the shape of a cylinder. The volume of a cylinder with the radius r and height h can be calculated by the following formula. V=Ï€ r^2 h In this case, we are given the diameter and the height of the cylinder. To find the radius we can divide the diameter d by 2.

r = d/2
r = 8/2
r = 4

We got that the radius of the cylinder is 4 inches. Now, we can substitute the height and the radius into the formula and calculate the volume of the cylinder.

V=Ï€ r^2 h
V=Ï€ ( 4)^2 ( 2)
â–¼
Simplify right-hand side
V=Ï€(16)(2)
V= π (32)
V=100.530...
V≈ 101

The volume of the round pan is about 101 cubic inches. Therefore, the volume of two round pans is about 2* 101 or about 202 cubic inches. Finally, we can compare the volume of the rectangular pan with the volume of two round pans. 234>202 We can see that the volume of the rectangular pan is greater than the volume of two round pans. Therefore, the rectangular pan will hold more cake batter than two round pans.