Question

a circular Park 112 in diameter has a path 7 metre wide running around it on the outside find the cost of gravelling the path at rupees 9per metre square ​

Answer 1

Answer:

23562 rupees

Step-by-step explanation:

          Radius=112/2

                     =56 m

                  R₁=56 m

                  R₂=56+7

                     =63 m

area of path to be graved =Л(R₂²-R₁²)m²

                                          $=\frac{22}{7}$(3969-3136)

                                          =$\frac{22}{7}$*833

                                          =2618 m²

                                 cost = 2618*9

                                         =23,562 rupees

Answer 2

Step-by-step explanation:

d=112m

r=112÷2

=56

area= pie × r × r

=3.14×56×56

=9,847.04

area of circle with path = pie × r × r

= 3.14 × 63 × 63

= 3.14 × 3,969

= 12,462.66

area of path = 12462.66 - 9847.04

= 2,615.62