Question

The diameter of a garden roller is 15.4 cm and it is 20.5 cm long. Find the area covered by it in 60 revolutions? *

Answer 1

Answer:

Diameter = 1.4 m

r = d/2

r = 1.4/2

r = 0.7m

curved  surface area of cyclinder = 2 * 22/7 * r^2                                                                                                     = 2 * 22/7 * 0.7 * 0.7                                                  = 8.8 m^2

                          No of revolution = 5

Therefore  = 8.8 * 5                    = 44 m2