Lesson Example Discussion Quiz: Class Homework |
Step-5 |
Title: Area of 3D shapes |
Grade: 8-a Lesson: S1-L6 |
Explanation: Hello Students, time to practice and review the steps for the problem. |
Lesson Steps
| Step | Type | Explanation | Answer |
|---|---|---|---|
1 |
Problem |
Find the total surface area of a container in a cylindrical shape whose diameter is 26 cm and height is 18 cm. Use value π is 3.14 |
|
2 |
Step |
Given diameter is height(h) is |
26 cm 18 cm |
3 |
Formula: |
Radius(r) of the cylinder = |
\$r = diameter/2\$ |
4 |
Step |
Substitute the value |
\$26/2 \$ \$= 13cm\$ |
5 |
Formula: |
Area of the cylinder |
\$A = 2πr(h + r)\$ |
6 |
Step |
Substitute the value |
\$A = 2 * 3.14*13(18 + 13)\$ \$A = 2 \times 3.14 \times 13(31)\$ \$A = 2530.84\$ |
7 |
Step |
So, the total surface area of the cylindrical container is |
\$2530.84\$ sq.cm |
8 |
Answer |
C |
|
Copyright © 2020-2022 saibook.us Contact: info@saibook.us Version: 1.5 Built: 29-June-2023 09:20AM EST