Tatiana and George are racing on a circular track. If Tatiana takes 48 minutes and George takes 40 minutes to complete the round. If they both start at the same point at the same time and go in same direction, after how many minutes will they meet again at the start point?
Two poles of equal heights are standing opposite to each other on either side of the road which is ^@ 20 \space meters ^@ wide. From a point between them on the road, the angles of elevation of the top of the poles are ^@ 30^\circ ^@ and ^@ 45^\circ ^@ respectively. Find the height of the poles.