(1) Ratio between the speed of carA and that of B = 4 : 5 Ratio of the time taken = 5 : 4 (∴Distance covered by both cars isthe same)1Car A takes 5xh and Car B takes4xh to reach the destination.1∴ 5x – 4x = 20/60 = 1/3 hTherefore, the time taken by car A =5x = 5/3 h