All Categories Alerts Wishlist Cart

What is the diameter of a circle if its area is 78.5 cm²? (2020)

Practice Questions

1 question
Q1
What is the diameter of a circle if its area is 78.5 cm²? (2020)
  1. 10 cm
  2. 8 cm
  3. 6 cm
  4. 12 cm

Questions & Step-by-step Solutions

1 item
Q
Q: What is the diameter of a circle if its area is 78.5 cm²? (2020)
Solution: Area = πr²; 78.5 = π * r²; r² = 78.5/π; d = 2√(78.5/π) = 10 cm.
Steps: 0

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 ..
A
A circle is inscribed in a square of side 10 cm. What is the area of the circle?
Question: A circle is inscribed in a square of side 10 cm. What is the area of the circle? (2019)Opt..
I
If a = 3 and b = 4, what is the value of a^2 + b^2? (2019)
Question: If a = 3 and b = 4, what is the value of a^2 + b^2? (2019)Options: 2512716Correct Answer: ..
A
A chord of a circle is 12 cm long and is 5 cm away from the center. What is the
Question: A chord of a circle is 12 cm long and is 5 cm away from the center. What is the radius of ..
F
Find the value of 9 × 9 - 5 × 5. (2023) 2023
Question: Find the value of 9 × 9 - 5 × 5. (2023) 2023Options: 56705080Correct Answer: 56Exam Year: ..
Biology (School & UG)
Biology (School & UG)
Chemistry (School & UG)
Chemistry (School & UG)
Civil Engineering
Civil Engineering
Commerce & Accountancy
Commerce & Accountancy
Computer Science & IT
Computer Science & IT
Current Affairs & GK
Current Affairs & GK
Data Structures & Algorithms
Data Structures & Algorithms
Electrical & Electronics Engineering
Electrical & Electronics Engineering
English (School)
English (School)
General Aptitude
General Aptitude
General Knowledge
General Knowledge
General Knowledge & Current Affairs
General Knowledge & Current Affairs
Languages & Literature
Languages & Literature
Law & Legal Studies
Law & Legal Studies
Major Competitive Exams
Major Competitive Exams
Mathematics (School)
Mathematics (School)
Mechanical Engineering
Mechanical Engineering
Medical Science
Medical Science
Physics (School & Undergraduate)
Physics (School & Undergraduate)
Quantitative Aptitude & Reasoning
Quantitative Aptitude & Reasoning
Social Science (School)
Social Science (School)
Technical
Technical
Verbal and Reasoning
Verbal and Reasoning
Vocational & Skill Development
Vocational & Skill Development
Soulshift Feedback ×

On a scale of 0–10, how likely are you to recommend The Soulshift Academy?

Not likely Very likely