The cylindrical roller for a cricket pitch is 1.5 m wide and has a radius of 0.3 m.

a) Calculate the curved surface area of the roller.

b) What is the minimum number of revolutions the roller would have to make to roll the cricket pitch once

if the pitch is 20 m long and 3 m wide? (Ignore any revolutions needed to turn the roller around.)

HyperYauFarer May 19, 2020

#1**+2 **

Surface area includes the two ends 2 * pi r^2 = 2 pi (.3)^{2 }m^{2}

plus the lateral area pi * d * width = pi (.6)(1.5) m^{2}

3 meters wide would mean yo would have to make 3 m / 1.5 m = 2 passes to cover the pitch

20 m long divided by the circumference ( pi (.6)) x 2 passes = ......... revs

ElectricPavlov May 19, 2020