12. The region in each of the following figures revolves about the indicated axis. For each case, a three-dimensional fig- ure is obtained. Name and sketch the figure and find the surface area of each. 30 cm 10 cm 15 cm 20 cm

12. The region in each of the following figures revolves about the indicated axis. For each case, a three-dimensional fig- ure is obtained. Name and sketch the figure and find the surface area of each. 30 cm 10 cm 15 cm 20 cm

Mathematics For Machine Technology

8th Edition

ISBN:9781337798310

Author:Peterson, John.

Publisher:Peterson, John.

Chapter39: Symbolism And Algebraic Expressions

Section: Chapter Questions

Problem 16A: What are the lengths of the following dimensions in Figure 39-11? Alldimensions are in millimeters....

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Concept explainers

Rate of Change

The relation between two quantities which displays how much greater one quantity is than another is called ratio.

Slope

The change in the vertical distances is known as the rise and the change in the horizontal distances is known as the run. So, the rise divided by run is nothing but a slope value. It is calculated with simple algebraic equations as:

Question

solve a and b please!

12. The region in each of the following figures revolves about
the indicated axis. For each case, a three-dimensional fig-
ure is obtained. Name and sketch the figure and find the
surface area of each.
b.
30 cm
10 cm
15 cmm

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