P and Q started a business by investing Rs. 10,000 and Rs. 16,000 respectively. After 6 months. R also joined them by investing Rs. 20,000. If the profit after two years be Rs. 16,400 what is Q’s share ?
A and B are 25 km apart. If they travel in opposite directions, they meet after one hour. If they travel in the same direction, they meet after 5 hours. If A travels faster than B, then the speed of A is