How to attempt this kind of question Car A started from town X at 8 a.m. and went towards town Y. Car B started from X at 9 a.m. in the same direction as A. It overtook A after covering 40% of the distance XY. Both cars then continued travelling towards Y. On reaching Y, B turned back immediately and crossed A after covering 12% of the distance YX. Find the time taken by car B to cover the distance XY.5 hours7.5 hours4.5 hours6 hours