Lesson Example Discussion Quiz: Class Homework |
Step-2 |
Title: Circles |
Grade: 8-a Lesson: S4-L2 |
Explanation: Let us verify the answer here with the steps. |
Description:
| Step | Type | Explanation | Answer |
|---|---|---|---|
1 |
Problem |
The circumference of a car wheel is 43.96 inches. What is the diameter? |
|
2 |
Hint |
Formula used |
\$"Diameter" = 2r\$ |
3 |
Clue |
Formula used |
\$"Circumference" = 2\pi r\$ |
4 |
Step |
The circumference of a car wheel is |
\$43.96 "inches"\$ |
5 |
Step |
⇒ |
\$2 \pi r = 43.96\$ |
6 |
Step |
⇒ |
\$r = (43.96) / (2 \pi )\$ |
7 |
Step |
⇒ |
\$r = (43.96) / (2 \times (3.14) )\$ (∵ π = 3.14) |
8 |
Step |
⇒ |
\$r = (43.96) / (6.28 )\$ |
9 |
Step |
By using the formula, |
\$d = 2 \times 7\$ |
10 |
Step |
Hence, the diameter of a car wheel is |
\$14 "inches"\$ |
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