Question

The diameter of the roller 120 cm long is 84cm if it takes 500 complete revolutions to level a playground determine the cost of levelling it at the rate of 30 paise per square metre

Answer 1

Answer:

47520 paisa

Step-by-step explanation:

h = 120cm, r = 42cm

area covered in 500 revolution = 500 x 2 x 22 x 120 x 42/7

                                                      = 1000 x 22 x 720

                                                      = 1000 x 15840

                                                      = 1,58,40,000cm^2

                                                      = 1584m^2

Total cost of levelling = 30 x 1584

                                    = 47520 paisa

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