Question

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

Answer 1

Step-by-step explanation:

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

area of circle pi r ^2 then 22/7×22×22= 1386cm ^2