A car owner buys petrol at rs.7.50, rs. 8 and rs. 8.50 per liter for three successive years. what approximately is the average cost per liter of petrol if he spends rs. 4000 each year?
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Total capacity consumed in 1st, 2nd and 3rd year = 4000/7.50, 4000/8 and 4000/8.50 i.e. = 533, 500 and 470 respectively.
Total capacity of petrol consumed in three years = 533+ 500+ 470 = 1504.
Total amount spent in three years= 4000 x 3 = 12000 INR
Therefore, average cost per litre = 12000/1504 INR= INR 7.97 cost per liter.
Total capacity of petrol consumed in three years = 533+ 500+ 470 = 1504.
Total amount spent in three years= 4000 x 3 = 12000 INR
Therefore, average cost per litre = 12000/1504 INR= INR 7.97 cost per liter.
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