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Can you explain the answer of this question below:
 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?
  • A:
    Rs. 8
  • B:
    Rs. 7.98
  • C:
    Rs. 6.2
  • D:
    Rs. 8.1
The answer is B.
Verified Answer
Can you explain the answer of this question below:A car owner buys die...
Average cost per litre of petrol = Total amount / Total quantity of petrol

Re. 4000 is spent each year, so total amount spent = 3 * Rs. 4000 = Rs. 12,000

Total quantity of petrol consumed in 3 years = (4000/7.50) + (4000/8) + (4000/8.50) litres

= 533.3 + 500 + 470.6 = 1505

Average cost = Total amount / Total quantity

= 12000/1504 = 7.98

To find quickly, you can take cube root of (7.50 * 8 * 8.50), and it will be slightly less than 8.

The correct option is B.
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Most Upvoted Answer
Can you explain the answer of this question below:A car owner buys die...
The owner will get 533.33 lit and 500 lit and 470.58 lit respectively.. so he total got 533.33+500+470.58 in 4000+4000+4000 rupees... so dividing 12000 with the litre.. u will get ur answer
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Community Answer
Can you explain the answer of this question below:A car owner buys die...
I think 7.98
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Can you explain the answer of this question below: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?A:Rs. 8B:Rs. 7.98C:Rs. 6.2D:Rs. 8.1The answer is B.
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