A car owner buys petrol at Rs.7.50, Rs. 8 and Rs. 8.50 per litre for three successive years. What approximately is the average cost per litre of petrol if he spends Rs. 4000 each year?
Pick one
A) Rs. 7.98 B) Rs. 8 C) Rs. 8.50 D) Rs. 9 E) Rs. 9.50
petrol used in 1st yr = 4000/7.5 = 533.33 ltr   petrol used in 2nd yr = 4000/8= 
<gadget id="calculator">4000/8</gadget>
<output>500</output>
500 ltr   petrol used in 3 rd year= 4000/8.5= 470.59 ltr   Total petrol used for Rs.12000(4000/- for each yaer) in 3rd yrs = 1503.92 ltr   Rs. 7.98verage cost per litre = 12000/1503.92 = Rs 7.98   Rs. 7.98NSWER:Rs. 7.98
<result>A</result>
A car owner buys petrol at Rs.7.50, Rs. 8 and Rs. 8.50 per litre for three successive years. What approximately is the average cost per litre of petrol if he spends Rs. 4000 each year?