All Categories Alerts Wishlist Cart

A circle has an area of 78.5 cm². What is its radius? (Use π = 3.14) (2019)

Practice Questions

1 question
Q1
A circle has an area of 78.5 cm². What is its radius? (Use π = 3.14) (2019)
  1. 5 cm
  2. 7 cm
  3. 10 cm
  4. 12 cm

Questions & Step-by-step Solutions

1 item
Q
Q: A circle has an area of 78.5 cm². What is its radius? (Use π = 3.14) (2019)
Solution: Area = πr². Therefore, r² = Area / π = 78.5 cm² / 3.14 = 25. r = √25 = 5 cm.
Steps: 0

Related Questions

A
A circle has a diameter of 20 cm. What is its circumference? (2022)
Question: A circle has a diameter of 20 cm. What is its circumference? (2022)Options: 62.8 cm40 cm31..
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..
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 ..
A
A circle has a radius of 5 cm. What is the length of an arc that subtends a cent
Question: A circle has a radius of 5 cm. What is the length of an arc that subtends a central angle ..
C
Calculate the value of 12 × 8 - 24. (2021)
Question: Calculate the value of 12 × 8 - 24. (2021)Options: 72964860Correct Answer: 72Solution: 12 ..
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