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 liter of petrol if he spends Rs. 4000 each year?	Answers
A) Rs. 7.98 B) Rs. 9.98 C) Rs. 10 D) Rs. 11 E) Rs. 12
Total quantity of petrol   consumed in 3 years   = 4000	+	4000	+	4000 litres   7.50	8	8.50   = 4000 2	+	1	+	2 litres   15	8	17   = 76700 litres   51   Total amount spent = Rs. (3 x 4000) = Rs. 12000.   Average cost = Rs. 12000 x 51 = Rs.	6120 = Rs. 7.98   76700	767   Rs. 7.98)
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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 liter of petrol if he spends Rs. 4000 each year?