An elastic belt is placed around the rim of a pulley of radius 5cm. (Fig. 12.46). From one point C on the belt, the elastic belt is pulled directly away from the centre O of the pulley until it is at P, 10cm from the point O. Find the length of the belt that is still in contact with the pulley. Also find the shaded area. (Use π= 3.14 and √3 = 1.73)
