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 ? Choose the correct choice from the following answers
A) 8.98	B) 7.98	C) 6.98	D) 4.98	E) 2.98
Explanation:   Total quantity of petrol consumed in 3 years = liters   = liters   = liters   Total amount spent = Rs. (3 x 4000) = Rs. 12000.   Average cost = Rs. = Rs. 7.98.   Answer: 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 litre of petrol if he spends Rs. 4000 each year ?