Krishna
0

Step 1: Make a note of the given information

                      Diameter of the (oil drum) cylinder = 2 m

                                                                  Height = 7 m

                      Painting change per 1 m^2 = 3 rupees

      

Step 2: Find the total surface area of a cylindrical drum

            FORMULA: Total surface area of a cylindrical drum = 2 \pi r (r + h)

                                                                                              = 2 *\pi*1(1 + 7)                        ( \because diameter = 2m

                                                                                                                                                       radius = \frac{2}{2} = 1m                                                                                                                                                                                                                                                                                                                  = 2 * \frac{22}{7} * 8

                                                                                            = \frac{352}{7}

                                                                                            = 50.28 m^2

          


Step 3: Calculate the cost of painting of 10 drums

                  Total surface area of a cylindrical drum = 50.28 m^2


                            Cost of painting of 10 drums = 50.28 ×3×10

                                                                          = 1508.40 rupees