NCHMCT JEE 2012 Question Paper with solutions for online practice

A and B standing at a distance of 20 km. from each other on a straight East-West road. A and B start walking simultaneously, eastwards and westwards respectively, and both cover a distance of 5 km. Then A turns to his left and walks 10 km. ‘B’ turns to his right and walks 10 km. at the same speed. Then both turn to their left and cover a distance of 5 km. at the same speed. What will be the distance between them?