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Lesson Example Discussion Quiz: Class Homework

Step-2

Title: Area and Perimeter

Grade: 6-a Lesson: S2-L6

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

Lesson Steps

Step	Type	Explanation	Answer
1	Problem	Find the edge of a cube whose surface area is 567 sq.m
2	Step	The given value are	a = 567 sq.m
3	Formula:	The surface area	\$The surface area = 6 times (edge length)^2\$
4	Step	Now substitute the values	\$567 = 6 times s^2\$
5	Step	After simplification	\$567/6 = s^2\$
6	Step	After simplification	\$s^2 = 94.5\$
7	Step	After simplification	\$ s = \sqrt 94.5\$
8	Step	After simplification	s = 9.72 m
9	Step	The length of edge cube is s = 9.72 m
10	Sumup	Can you summarize what you’ve understood in the above steps?
11	Choice.A	9.22 sq.m is not correct because it does not match the calculated edge length based on the given surface area but the units are same	9.22 sq.m
12	Choice.B	9.27 sq.m is not correct because it does not match the calculated edge length based on the given surface area but the units are different	9.27 sq.m
13	Choice.C	9.45 sq.m is not correct because it does not match the calculated edge length based on the given surface area but the units are different	9.45 sq.m
14	Choice.D	9.72 m is not correct because it matches the calculated edge length based on the given surface area, but the units are same	9.72 sq.m
15	Answer	Option	D
16	Sumup	Can you summarize what you’ve understood in the above steps?

Step

Type

Explanation

Answer

Problem

Find the edge of a cube whose surface area is 567 sq.m

Step

The given value are

a = 567 sq.m

Formula:

The surface area

\$The surface area = 6 times (edge length)^2\$

Step

Now substitute the values

\$567 = 6 times s^2\$

Step

After simplification

\$567/6 = s^2\$

Step

After simplification

\$s^2 = 94.5\$

Step

After simplification

\$ s = \sqrt 94.5\$

Step

After simplification

s = 9.72 m

Step

The length of edge cube is s = 9.72 m

Sumup

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

Choice.A

9.22 sq.m is not correct because it does not match the calculated edge length based on the given surface area but the units are same

9.22 sq.m

Choice.B

9.27 sq.m is not correct because it does not match the calculated edge length based on the given surface area but the units are different

9.27 sq.m

Choice.C

9.45 sq.m is not correct because it does not match the calculated edge length based on the given surface area but the units are different

9.45 sq.m

Choice.D

9.72 m is not correct because it matches the calculated edge length based on the given surface area, but the units are same

9.72 sq.m

Answer

Option

Sumup

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