All Categories
Alerts
Wishlist
Cart
Sign In
Categories
Current Affairs & GK
Current Affairs
Show All Current Affairs & GK
General Aptitude
Arithmetic Aptitude
Data Interpretation
Show All General Aptitude
General Knowledge
Basic General Knowledge
General Science
Show All General Knowledge
Medical Science
Anatomy
Biochemical Engineering
Biochemistry
Biotechnology
Microbiology
Show All Medical Science
Technical
Database
Digital Electronics
Electronics
Networking
Show All Technical
Verbal and Reasoning
Logical Reasoning
Verbal Ability
Verbal Reasoning
Show All Verbal and Reasoning
›
If the circumference of a circle is 31.4 cm, what is the radius? (2020) 2020
If the circumference of a circle is 31.4 cm, what is the radius? (2020) 2020
Expand All
Collapse All
Practice Questions
1 question
Q1
If the circumference of a circle is 31.4 cm, what is the radius? (2020) 2020
5 cm
10 cm
15 cm
20 cm
Show Solution
Copy
Circumference = 2πr. Therefore, r = Circumference / (2π) = 31.4 cm / (2 * 3.14) = 5 cm.
Questions & Step-by-step Solutions
1 item
Q
Q: If the circumference of a circle is 31.4 cm, what is the radius? (2020) 2020
Solution:
Circumference = 2πr. Therefore, r = Circumference / (2π) = 31.4 cm / (2 * 3.14) = 5 cm.
Steps: 7
Show Steps
Step 1: Understand that the circumference of a circle is given by the formula: Circumference = 2πr, where r is the radius.
Step 2: We know the circumference is 31.4 cm. So we can set up the equation: 31.4 cm = 2πr.
Step 3: To find the radius (r), we need to rearrange the formula. We can do this by dividing both sides by 2π: r = Circumference / (2π).
Step 4: Substitute the value of the circumference into the equation: r = 31.4 cm / (2 * π).
Step 5: Use the approximate value of π, which is 3.14. So, calculate 2 * 3.14 = 6.28.
Step 6: Now, divide 31.4 cm by 6.28: r = 31.4 cm / 6.28.
Step 7: Perform the division: r = 5 cm.
Related Questions
A
A circle has an area of 78.5 cm². What is its radius? (Use π = 3.14) (2019)
Question: A circle has an area of 78.5 cm². What is its radius? (Use π = 3.14) (2019)Options: 5 cm7 ..
W
What is the value of (3 + 5) × (2 - 1)? (2020)
Question: What is the value of (3 + 5) × (2 - 1)? (2020)Options: 816106Correct Answer: 8Solution: (3..
I
If a circle has a circumference of 31.4 cm, what is its radius? (2022)
Question: If a circle has a circumference of 31.4 cm, what is its radius? (2022)Options: 5 cm10 cm15..
F
Find the value of 5! (5 factorial). (2019)
Question: Find the value of 5! (5 factorial). (2019)Options: 12010015090Correct Answer: 120Solution:..
W
What is the area of a triangle with base 10 cm and height 5 cm? (2021)
Question: What is the area of a triangle with base 10 cm and height 5 cm? (2021)Options: 25 cm²50 cm..
‹
Biology (School & UG)
Chemistry (School & UG)
Civil Engineering
Commerce & Accountancy
Computer Science & IT
Current Affairs & GK
Data Structures & Algorithms
Electrical & Electronics Engineering
English (School)
General Aptitude
General Knowledge
General Knowledge & Current Affairs
Languages & Literature
Law & Legal Studies
Major Competitive Exams
Mathematics (School)
Mechanical Engineering
Medical Science
Physics (School & Undergraduate)
Quantitative Aptitude & Reasoning
Social Science (School)
Technical
Verbal and Reasoning
Vocational & Skill Development
›
Soulshift Feedback
×
On a scale of 0–10, how likely are you to recommend
The Soulshift Academy
?
0
1
2
3
4
5
6
7
8
9
10
Not likely
Very likely
✕
↑
