1. A shopkeeper purchased 2 refrigerators for Rs 9800 and Rs 8200 respectively. He sold them for Rs 16920. Find loss%.
2. In selling a plot of land for Rs 61200, a profit of 20% is made. The cost price of the plot is
3. The simple interest on Rs 2000 for 4 years is Rs 400. The rate per cent of interest is
4. The simple interest of Rs 500 at the rate of 5% is Rs 100. This interest is of the time.