Question

the inner circumference of a circular acupressure track is 115m and width of the track is 5 meter find the cost of putting up a fence along the outer circle of the track at the rate of rs 120m.

Answer 1

given:inner circumference=115 m

         width of track=5 m

to find: length of the outer circumference

           cost of fencing along the outer circumference at the rate of 120 rupees/meter

solution: circumference of inner circle = 2πr -------1

              we know that the circumference is 115m

                     so by adding the answer to the 1 equation we get:

                   

                              2πr=115m

                            solving for r we get:

                             r=18.30m------2

we know that the widht is 5 m

 by adding the width to the inner circle radius we get the radius of outer circle

    18.30+5=23.30m

  now the circumference of outer circle

that is 2πR

   2×π×23.30=146.39

now cost = 146.39×120=17566.8rupees

                                                                        hence solved  :-)

Answer 2

Answer:

i jst hope it's helps u...☮️