Question

find the area of a circle with diamerter 28 cm​

Answer 1

Answer:

Given, Diameter of a circle =28cm

WKT, Radius of a circle r=  

2

d

​  

=  

2

28

​  

=14cm

Then,

Area of the circle =πr  

2

 sq units

=  

7

22

​  

×14×14

=22×2×14

=616cm  

2

Answer 2

area= πr²

but it is given in diameter so convert into radius so 28/2=14

now solve them

22/7×14×14

by cancellation method cancell 7 and 14

now

22×2×14

44×14

616cm²