Lesson Example Discussion Quiz: Class Homework |
Step-3 |
Title: Surface area for Cube & Cylinder |
Grade: 6-a Lesson: S3-L2 |
Explanation: Hello Students, time to practice and review the steps for the problem. |
Lesson Steps
| Step | Type | Explanation | Answer |
|---|---|---|---|
1 |
Problem |
The surface area of a cylinder is 120 cm², and its height is 8 cm. If the radius is unknown, find the radius.(π = 3.14) |
|
2 |
Step |
The given values are |
Surface are = 120 sq.cm and h = 8 cm pi = 3.14 |
3 |
Formula |
The lateral surface area cylinder is |
\$"Lateral surface area" = 2π"rh"\$ |
4 |
Step |
Now plug the values in the formula |
\$120 = 2π"r" times 8\$ |
5 |
Step |
Slove for radius |
\$(120)/(16π) = "r"\$ |
6 |
Step |
After simplification |
r = 2.38 cm |
7 |
Step |
So, the radius of the cylinder is 2.38 cm. |
|
8 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
9 |
Choice.A |
This is wrong due to miscalculation by using the formula |
2.83 cm |
10 |
Choice.B |
This is wrong due to miscalculation by using the formula |
3.28 cm |
11 |
Choice.C |
This is correct due to accurately done the calculation by using the formula |
2.38 cm |
12 |
Choice.D |
This is wrong due to miscalculation by using the formula |
3.82 cm |
13 |
Answer |
Option |
C |
14 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
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