Question

Find the area of a circle of diameter=7c.m.​

Answer 1

Answer: 38.5 cm²

Step-by-step explanation:

Formula for area of a circle = πr²

Diameter = 7cm

Radius = d/2 = 7/2

Area = πr²  

= 22/7 x 7/2 x7/2

= 77/2 = 38.5

Hence area of circle with diameter 7 is 38.5 cm²

Answer 2

Answer:

38.5 cm^2

Step-by-step explanation:

diameter = 2* radius

Here,

7 = 2* radius

7/2 = radius  

Now,  

area of circle = (22*7*7)/(7*2*2)

area of circle = (11*7)/2

area of circle = 77/2 = 38.5cm^2

Then,

Area of circle = 38.5 cm^2