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If a circle has a radius of 5 units, what is its circumference (rounded to the nearest whole number)?
- a)16 units
- b)31 units
- c)32 units
- d)21 units
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
If a circle has a radius of 5 units, what is its circumference (rounde...
Circumference of a circle = 2 * π * radius ≈ 2 * 3.14 * 5 ≈ 31 units.
This question is part of UPSC exam. View all Class 5 courses
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If a circle has a radius of 5 units, what is its circumference (rounde...
Understanding Circumference
The circumference of a circle is the distance around it. To calculate the circumference, you can use the formula:
- Circumference = 2 * π * radius
Where:
- π (Pi) is approximately 3.14
- The radius is the distance from the center of the circle to its edge.
Calculating Circumference for a Circle with Radius 5 Units
Given that the radius of the circle is 5 units, we can substitute this value into the formula:
- Circumference = 2 * π * 5
Now, let’s calculate it step by step:
- First, multiply 2 by the radius:
- 2 * 5 = 10
- Next, multiply by π (approximately 3.14):
- 10 * 3.14 = 31.4
Rounding to the Nearest Whole Number
When rounding 31.4 to the nearest whole number, we look at the decimal part:
- Since 0.4 is less than 0.5, we round down to 31.
Therefore, the circumference of the circle is approximately 31 units.
Conclusion
The correct answer to the question about the circumference of a circle with a radius of 5 units is:
- Option B: 31 units
This illustrates the importance of using the right formula and rounding correctly to find the final answer.
The circumference of a circle is the distance around it. To calculate the circumference, you can use the formula:
- Circumference = 2 * π * radius
Where:
- π (Pi) is approximately 3.14
- The radius is the distance from the center of the circle to its edge.
Calculating Circumference for a Circle with Radius 5 Units
Given that the radius of the circle is 5 units, we can substitute this value into the formula:
- Circumference = 2 * π * 5
Now, let’s calculate it step by step:
- First, multiply 2 by the radius:
- 2 * 5 = 10
- Next, multiply by π (approximately 3.14):
- 10 * 3.14 = 31.4
Rounding to the Nearest Whole Number
When rounding 31.4 to the nearest whole number, we look at the decimal part:
- Since 0.4 is less than 0.5, we round down to 31.
Therefore, the circumference of the circle is approximately 31 units.
Conclusion
The correct answer to the question about the circumference of a circle with a radius of 5 units is:
- Option B: 31 units
This illustrates the importance of using the right formula and rounding correctly to find the final answer.
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If a circle has a radius of 5 units, what is its circumference (rounded to the nearest whole number)?a)16 unitsb)31 unitsc)32 unitsd)21 unitsCorrect answer is option 'B'. Can you explain this answer?
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If a circle has a radius of 5 units, what is its circumference (rounded to the nearest whole number)?a)16 unitsb)31 unitsc)32 unitsd)21 unitsCorrect answer is option 'B'. Can you explain this answer? for Class 5 2025 is part of Class 5 preparation. The Question and answers have been prepared according to the Class 5 exam syllabus. Information about If a circle has a radius of 5 units, what is its circumference (rounded to the nearest whole number)?a)16 unitsb)31 unitsc)32 unitsd)21 unitsCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 5 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If a circle has a radius of 5 units, what is its circumference (rounded to the nearest whole number)?a)16 unitsb)31 unitsc)32 unitsd)21 unitsCorrect answer is option 'B'. Can you explain this answer?.
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