Question

the perimeter of a circle diameter is 1.4cm​

Answer 1

Given, Diameter of a circle =1.4m

So, radius of the circle r=

2

1.4

m=0.7m

Then,

Area of the circle =πr

2

sq units

=

7

22

×0.7×0.7 m

2

=22×0.1×0.7 m

2

=1.54m

2

Answer 2

Answer:

22/5

Step-by-step explanation:

Diameter = 1.4 cm

Radius = Diameter/2

= 1.4cm/2

= 0.7 cm

Perimeter of circle = 2πr

= 2 × 22/7 × 0.7

= 2 × 22/7 × 7/10

= 22/5