A car owner buys petrol at Rs 8 and Rs 10 per litre in two successive years. If he spends Rs 4000 each year, what is the approximate average cost per litre over the two years?

ARs 9

BRs 9.90

CRs 8.88 ✓ Correct

DNone of the above

Correct answer: (C) Rs 8.88

Explanation

The average cost is about Rs 8.88 per litre.

Litres in year 1 = 4000 / 8 = 500; in year 2 = 4000 / 10 = 400.

Total spent = 4000 + 4000 = 8000 on 500 + 400 = 900 litres.

Average = 8000 / 900.

= 8.88 per litre.

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