Lesson Example Discussion Quiz: Class Homework |
Step-2 |
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 length and width of a cuboid with surface area 584.5 sq. feet are 13 feet and 9.5 feet, respectively. Find the height of the cuboid. |
|
2 |
Step |
The given values are |
Surface area = 584.5 sq.ft l = 13 ft w = 9.5 ft |
3 |
Formula |
The surface area of a cuboid is |
\$"Surface area" = 2(lw + lh + wh)\$ |
4 |
Step |
Now plug the values into the formula |
\$584.5 = 2(13 times 9.5 + 13 times h + 9.5 times h)\$ |
5 |
Step |
Simplify the expression |
\$584.5 = 2( 123.5 + 13h + 9.5 h)\$ |
6 |
Step |
After simplification |
\$584.5 = 2( 123.5 + 22.5 h)\$ |
7 |
Step |
After simplification |
584.5 = 247 + 45h |
8 |
Step |
After simplification |
337.5 = 45h |
9 |
Step |
After simplification |
h = 7.5 ft |
10 |
Step |
The height of cuboid is 7.5 ft. |
|
11 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
12 |
Choice.A |
The correct answer is reflected in the cuboid’s calculated height, making the choice equivalent to it |
7.5 feet |
13 |
Choice.B |
The selected option does not match the computed height of the cuboid, suggesting an inaccurate response |
9.5 feet |
14 |
Choice.C |
The selected option does not match the computed height of the cuboid, suggesting an inaccurate response |
11.5 feet |
15 |
Choice.D |
The selected option does not match the computed height of the cuboid, suggesting an inaccurate response |
13 feet |
16 |
Answer |
Option |
A |
17 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
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