Question

6. What will be the area of a circle whose diameter is 42 cm ?​

Answer 1

Answer:

1386 cm^2

Step-by-step explanation:

Diameter = 42 cm

Radius = 42/2 = 21 cm

Area of a circle = πr^2

(22/7)*21*21

66*21

1386 cm^2

Answer 2

Answer:

Radius = ${\frac{Diameter}{2}}$

➢ ${\frac{42}{2}}$

➢ 21cm

Area of circle = $πr^2$

➢${\frac{22}{7}}×21×21$

➢ 22×3×21

➢ 1386$cm^2$