16. Jagmohan, Rooplal and Pandeyji rented a video cassette for one week at rent of Rs. 350, If the use it for 6 hours, 10 hours, and 12 hours respectively, the rent to be paid by Pandeyji is :

17. A and B start a business with initial investments in the ratio 12 : 11 and their annual profits were in the ratio 4 :1. If A invested the money for 11 months, B invested the money for:

18. Kanti started a business investing Rs. 9000, Five months later sudhakar joined him by investing Rs. 8000. If they make a profit of Rs. 6970 at the end of year, Sudhakar�s share of profit is: