Average Practice Test 7

Question : 7 of 22

Marks: +1, -0

A car owner buys diesel 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 diesel if he spends Rs 4000 each year?

Rs. 9
Rs. 8.50
Rs. 8
Rs. 7.98

Validate

Solution:

Total consumption of diesel in three years

=4000/7.5+4000/8+4000/8.5

={27200+25500+24000}/51

=76700/51l

Total expenditure on diesel in three years = 3 × Rs. 4000 = Rs. 12000
Hence, average cost per litre of diesel

= {12000×51}/7670\Rs. 7.98

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