TS Police SI Prelims 2016 Solved Paper

The electricity bill of a certain establishment is partly fixed and partly varies with the number of units of electricity consumed. In a certain month when 540 units are consumed, the bill is Rs. 1,800. In another month the consumed units are 620 and the bill is Rs. 2,040. If 500 units of electricity is consumed in a month, the bill for that month is