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What is the area of a circle with a diameter of 10 cm? (Use π = 3.14)

Practice Questions

Q1
What is the area of a circle with a diameter of 10 cm? (Use π = 3.14)
  1. 78.5 cm²
  2. 31.4 cm²
  3. 50 cm²
  4. 100 cm²

Questions & Step-by-Step Solutions

What is the area of a circle with a diameter of 10 cm? (Use π = 3.14)
Correct Answer: 78.5 cm²
  • Step 1: Identify the diameter of the circle, which is given as 10 cm.
  • Step 2: Calculate the radius by dividing the diameter by 2. So, radius = 10 cm / 2 = 5 cm.
  • Step 3: Use the formula for the area of a circle, which is Area = π × radius².
  • Step 4: Substitute the value of π (3.14) and the radius (5 cm) into the formula. So, Area = 3.14 × (5 cm)².
  • Step 5: Calculate (5 cm)², which is 25 cm².
  • Step 6: Multiply 3.14 by 25 cm² to find the area. So, Area = 3.14 × 25 cm² = 78.5 cm².
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