Lesson Example Discussion Quiz: Class Homework |
Step-3 |
Title: Surface area of 3D shapes(Cube, cuboid, Cone) |
Grade: 4-a Lesson: S3-L1 |
Explanation: Hello Students, time to practice and review the steps for the problem. |
Lesson Steps
| Step | Type | Explanation | Answer |
|---|---|---|---|
1 |
Problem |
The area of one side of a cube is 64 square cm. Find the total surface area of the cube. |
|
2 |
Step |
The given values are |
A = 64 sq.cm |
3 |
Formula |
Total surface area of cube is |
\$ "Totalsurface area" = 6s^2\$ |
4 |
Hint |
If the area of one side is 64 sq. cm, then the side length (s) can be found by taking the square root of the area. |
|
5 |
Step |
Taking square root |
\$s =\sqrt( 64)\$ |
6 |
Step |
After simplification |
s = 8 cm |
7 |
Step |
Now plug the values into the formula |
\$"Total surface area" = 6 times (8)^2\$ |
8 |
Step |
After simplification |
\$"Total surface area" = 6 times 64\$ |
9 |
Step |
After simplification |
Total surface area = 384 sq.cm |
10 |
Step |
The total surface area of cone is 384 sq.cm. |
|
11 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
12 |
Choice.A |
The given option is incorrect, deviating from the provided choices, and inaccurately represents the cone surface area |
256 sq.cm |
13 |
Choice.B |
The answer aligns with this option, confirming that it is the accurate value for a cone surface area |
384 sq.cm |
14 |
Choice.C |
The given option is incorrect, deviating from the provided choices, and inaccurately represents the cone surface area |
512 sq.cm |
15 |
Choice.D |
The given option is incorrect, deviating from the provided choices, and inaccurately represents the cone surface area |
448 sq.cm |
16 |
Answer |
Option |
B |
17 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
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