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Lesson Example Discussion Quiz: Class Homework

Step-3

Title: Time coversations

Grade: 6-a Lesson: S2-L8

Explanation: Hello Students, time to practice and review the steps for the problem.

Lesson Steps

Step	Type	Explanation	Answer
1	Problem	Find the surface area of the rectangular solid(3in,6in,6in)
2	Step	The given values	l =3 in ,w = 6 in ,h = 6 in
3	Formula:	The surface area of rectangle solid	\$Surface Area = 2lw + 2lh + 2wh\$
4	Step	Now substitute the values	\$Surface area = 2 times 3 times 6 + 2 times 3 times 6 + 2 times 6 times 6\$
5	Step	After simplification	\$Surface area = 36 + 36 + 72\$
6	Step	After simplification	\$ Surface area = 144 sq.in\$
7	Step	The surface area of a rectangle solid is 144 sq. in
8	Sumup	Can you summarize what you’ve understood in the above steps?
9	Choice.A	144 in is not correct because the correct answer is 144 in², not 144 in	144 in
10	Choice.B	This is correct because units are the same and calculation are accurately done	\$144 in^2\$
11	Choice.C	148 in is not correct because the correct answer is 144 in², not 148 in	148 in
12	Choice.D	This is not correct because units are the same but mistakes in calculations	\$148 in^2\$
13	Answer	Option	B
14	Sumup	Can you summarize what you’ve understood in the above steps?

Step

Type

Explanation

Answer

Problem

Find the surface area of the rectangular solid(3in,6in,6in)

Step

The given values

l =3 in ,w = 6 in ,h = 6 in

Formula:

The surface area of rectangle solid

\$Surface Area = 2lw + 2lh + 2wh\$

Step

Now substitute the values

\$Surface area = 2 times 3 times 6 + 2 times 3 times 6 + 2 times 6 times 6\$

Step

After simplification

\$Surface area = 36 + 36 + 72\$

Step

After simplification

\$ Surface area = 144 sq.in\$

Step

The surface area of a rectangle solid is 144 sq. in

Sumup

Can you summarize what you’ve understood in the above steps?

Choice.A

144 in is not correct because the correct answer is 144 in², not 144 in

144 in

Choice.B

This is correct because units are the same and calculation are accurately done

\$144 in^2\$

Choice.C

148 in is not correct because the correct answer is 144 in², not 148 in

148 in

Choice.D

This is not correct because units are the same but mistakes in calculations

\$148 in^2\$

Answer

Option

Sumup

Can you summarize what you’ve understood in the above steps?