Math, asked by Uvnar759, 1 year ago

A garden roller whose lengtg is 3 m long and whose diameter 2.8m is rolled to level a garden .How much area will it cover in 8 revolutions

Answers

Answered by Anonymous
23

Step-by-step explanation:

circumference of circle = 2pir

                                       = 2 x pi x 1.4

                                       = 8.81 m

Area = length x breadth

        = 8.81 x 3

        = 26 .43 m^{2}

Area cover in 8 revolutions = 26.43 x 8

                                              = 211.44 m^{2}

Answered by SpideySudar
5

Answer:

        211.2 m^{2}

Step-by-step explanation:

       We know that,

                  l = 3 m

                  diameter = 2.8 m , then, radius = 2.8 / 2 = 1.4 m.

        So, we get,

              circumference of the circle  = 2πr

                                                               = 2 x \frac{22}{7} x 1.4

                                                              = 2 x \frac{22}{7} x \frac{14}{10}

                                                               = 2 x 11 x \frac{2}{5}

                                                               = 8.8 m

               Area of the circle = length x circumference

                                             = 3 x 8.8

                                             = 26.4 m^{2}

               Area covered in 8 revolutions = 26.4 x 8

                                                                   = 211.2 m^{2}

        Hence, we get the answer,

                     Area covered by the garden roller in 8 revolutions = 211.2 m^{2}

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