Lesson Example Discussion Quiz: Class Homework |
Step-1 |
Title: Three-dimensional (3D) shapes |
Grade: 6-a Lesson: S4-L2 |
Explanation: Let us verify the answer here with the steps. |
Lesson Steps Head1
| Step | Type | Explanation | Answer |
|---|---|---|---|
1 |
Problem |
Find the total surface area of a cuboid having dimensions as length = 14.5 cm , width = 17cm , height = 22cm ? |
|
2 |
Step |
The given values are |
l = 14.5 cm , w = 17 cm and h = 22 cm |
3 |
Formula |
The total surface area of a cuboid |
\$ 2 ("length" times "width" + "width" times "height" + "height" times "length")\$ |
4 |
Step |
Now, plug these values into the formula |
\$"Total Surface Area" = 2 times (14.5 times 17 + 17 times 22 + 22 times 14.5 )\$ |
5 |
Step |
After simplification |
\$"Total surface area" = 2 times (246.5 + 374 + 319)\$ \$"Total surface area" = 2 times 939.5\$ Total surface area = 1879 sq.cm |
6 |
Step |
The total surface area of a cuboid is 1879 sq.cm. |
|
7 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
8 |
Choice.A |
This is incorrect because it’s higher than the correct answer |
1978 sq.cm |
9 |
Choice.B |
This option is correct |
1879 sq.cm |
10 |
Choice.C |
This is close but still incorrect. It’s the result of a calculation error or possibly rounding |
1897 sq.cm |
11 |
Choice.D |
This is incorrect because it’s higher than the correct answer |
1987 sq.cm |
12 |
Answer |
Option |
B |
13 |
SumUp |
Can you summarize what you’ve understood in the above steps? |
|
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