Question

in an art competition first second and third price comprise of colour pencil in a set of 30 25 and 20 how many minimum of pencils are required to make set of 1st 2nd 3rd prize​

Answer 1

Answer:

Length of the boundary = Perimeter of a semicircle

∴(π+2)r=36m=(

7

22

+2)×r=36

(

7

22+14

)×r=36m=

7

36

×r=36⇒r=7m

Area of the park = Area of the semicircle

A=

2

πr

2

sq. units =

7

22

×

2

7×7

=77m

2

∴ Area of the park = 77 m

2

.