Question

Find the area of circle whose diameter is 42 CM.​

Answer 1

Solution:

• Diameter of circle = 42 cm

➜ Radius of circle = 1/2 × 42

➜ Radius of circle = 21 cm

Formula used here:

• Area of circle = πr²

Putting the values:

➪ Area of circle = 22/7 × 21 × 21

➪ Area of circle = 1386 cm²

Therefore:

• The area of the circle is 1386 cm².

Answer 2

Answer:

1386 is the correct answer

Step-by-step explanation:

r= 42/2

r= 21

area of circle= 22/7 ×21×21

= 22×3×21

= 1386