A garden sprinkler is fixed at one corner of a lawn and sprays water in a circular sector of radius 12 m through an angle of 120∘. (Use π=3.14.)
a. (i) Calculate the area of the lawn that receives water in one full rotation of the sprinkler.
b. (ii) If the sprinkler releases water at the rate of 1 litre per square metre, determine the total volume of water released in one full rotation.