Paper 1 · Mathematical Reasoning and Aptitude
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 — The average cost is about Rs 8.88 per litre, so that is the answer.
Explanation
★The average cost is about Rs 8.88 per litre, so that is the answer.
★In the first year Rs 4000 at Rs 8 per litre buys 500 litres.
★In the second year Rs 4000 at Rs 10 per litre buys 400 litres.
★The total money spent is Rs 8000 for 900 litres.
★The average cost is 8000 divided by 900.
★This is about Rs 8.88 per litre.
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