Question

A cylinder garden roller is 75 cm long and it's radius is 14 cm. How many revolutions will it make to level an area of 9900 cm square.

Answer 1

Answer:

Step-by-step explanation:

height of cylindrical pillar = 75 cm

radius of cylindrical pillar = 14 cm

CSA of cylindrical pillar =  2pirl

                                         = 2*22/7*14*75

                                           = 150*44

                                            = 6600 cm

area to be covered = 9900 cm

no. of revolution required = 9900/6600

                                           =3/2 revolutions

                                               

                                   

Answer 2

curved surface area of cylinder=2πrh

=>2×22/7×14cm×75cm

=>88cm×75cm

revolutions it will take=total area of ground/curved surface area of cylinder

=>9900cm²/88cm×75cm

=>1.5

hence 1.5 revolution it will take

hope it helps you mate

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