Question

hi guys, pls answer these questions fast with explanation i will mark brainliast.​

Answer 1

Step-by-step explanation:

2πr

2×3.14×14 ( Taking pie as 3.14) = 87.92cm

I hope you can do rest of the examples as directed

Answer 2

a) 14cm

= area of a circle = pie x radius2(square)

= area of a circle = 22/7 x 14cm2(square)

= area of a circle = 22/7 x 196cm

= area of a circle = 616cm2(square)

b) 28mm

= area of a circle = pie x radius2(square)

= area of a circle = 22/7 x 28mm2(square)

= area of a circle = 22/7 x 784mm

= area of a circle = 2464mm2(square)

c) 21cm

= area of a circle =  pie x radius2(square)

= area of a circle = 22/7 x 21cm2(square)

= area of a circle = 22/7 x 441cm

= area of a circle = 1386cm2(square)