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In a circle, if the radius is 10 cm, what is the area of the circle?

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Question: In a circle, if the radius is 10 cm, what is the area of the circle?

Options:

  1. 100π cm²
  2. 50π cm²
  3. 25π cm²
  4. 200π cm²

Correct Answer: 100π cm²

Solution: 

The area of a circle is given by the formula A = πr². Therefore, A = π(10)² = 100π cm².

In a circle, if the radius is 10 cm, what is the area of the circle?

Practice Questions

Q1
In a circle, if the radius is 10 cm, what is the area of the circle?
  1. 100π cm²
  2. 50π cm²
  3. 25π cm²
  4. 200π cm²

Questions & Step-by-Step Solutions

In a circle, if the radius is 10 cm, what is the area of the circle?
  • Step 1: Identify the formula for the area of a circle, which is A = πr².
  • Step 2: Substitute the radius (r) into the formula. Here, the radius is 10 cm.
  • Step 3: Calculate r², which is 10² = 100.
  • Step 4: Multiply 100 by π to find the area. So, A = 100π cm².
  • Area of a Circle – The area of a circle is calculated using the formula A = πr², where r is the radius.
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