Question

the diameter of the circular park is 140 m. around it on the outside ,a path having the width of 7 m is constructed .if the path has to be fenced from inside and outside at the rate of rs 7 per metre,find its total cost.​

Answer 1

Answer:

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Answer 2

Answer:

Rs.6468m^2

step by step explanation:

the diameter of circular park = 140

So, its half is its radius = 140/2 =70

Now this line or inside distance :  

Circumference = 2πr = 2*22*70/7

                         = 440 m

For outside distance :

Radius = 70+7                                            [ because the path is 7m wide ]

            =77 m                                                    

Circumference = 2πr = 2*22*77/7

                         = 484 m

Total length = 440+484

                    =924 m

Cost = Rs.7×924

        =Rs.6468 m^2