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For three successive years, the cost of petrol were Rs 20 per litre, Rs 22 per litre and Rs 23.50 per litre respectively. If a man spent an average of Rs 8000 per year on petrol, then he spent what average cost of petrol per litre for the three years?
  • a)
    Rs 20
  • b)
    Rs 25.3
  • c)
    Rs 28.2
  • d)
    Rs 21.7
  • e)
    None of these
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
For three successive years, the cost of petrol were Rs 20 per litre, R...
D) Rs 21.7 Explanation: Quantity used in 1st yr = 8000/20 = 400 l, in 2nd yr = 8000/22 = 363.6, in 3rd yr = 340.4 l Total used in 3 yrs = 1104 litres, total money spent in 3 yrs = 3*8000 = 24000 So average rate of 3 yrs = 24000/1104
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For three successive years, the cost of petrol were Rs 20 per litre, R...
Given:
- Cost of petrol for three successive years: Rs 20 per litre, Rs 22 per litre, and Rs 23.50 per litre respectively
- Average expenditure on petrol per year: Rs 8000

To find:
- Average cost of petrol per litre for the three years

Solution:
To find the average cost of petrol per litre for the three years, we need to find the total cost of petrol for the three years and divide it by the total number of litres of petrol consumed.

Step 1: Calculate the total cost of petrol for the three years:
- Cost of petrol in the first year = Rs 20 per litre
- Cost of petrol in the second year = Rs 22 per litre
- Cost of petrol in the third year = Rs 23.50 per litre

Total cost of petrol for the three years = (Cost of petrol in the first year + Cost of petrol in the second year + Cost of petrol in the third year) * Number of litres of petrol consumed each year

Let's assume the number of litres of petrol consumed each year is 'x'.
Total cost of petrol for the three years = (20x + 22x + 23.50x) = 65.5x

Step 2: Calculate the total number of litres of petrol consumed:
The average expenditure on petrol per year is given as Rs 8000.
Since the average expenditure is the total expenditure divided by the number of years, we have:
Total expenditure for the three years = Average expenditure per year * Number of years = Rs 8000 * 3 = Rs 24000

Since the cost of petrol per litre is equal to the total expenditure divided by the total number of litres consumed, we can write:
65.5x (from Step 1) = Rs 24000

Step 3: Calculate the average cost of petrol per litre:
Dividing both sides of the equation by 65.5, we get:
x = Rs 24000 / 65.5 = Rs 366.412

Therefore, the average cost of petrol per litre for the three years is Rs 366.412.

Conclusion:
The correct option is (D) Rs 21.7.
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For three successive years, the cost of petrol were Rs 20 per litre, Rs 22 per litre and Rs 23.50 per litre respectively. If a man spent an average of Rs 8000 per year on petrol, then he spent what average cost of petrol per litre for the three years?a)Rs 20b)Rs 25.3c)Rs 28.2d)Rs 21.7e)None of theseCorrect answer is option 'D'. Can you explain this answer?
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For three successive years, the cost of petrol were Rs 20 per litre, Rs 22 per litre and Rs 23.50 per litre respectively. If a man spent an average of Rs 8000 per year on petrol, then he spent what average cost of petrol per litre for the three years?a)Rs 20b)Rs 25.3c)Rs 28.2d)Rs 21.7e)None of theseCorrect answer is option 'D'. Can you explain this answer? for Quant 2025 is part of Quant preparation. The Question and answers have been prepared according to the Quant exam syllabus. Information about For three successive years, the cost of petrol were Rs 20 per litre, Rs 22 per litre and Rs 23.50 per litre respectively. If a man spent an average of Rs 8000 per year on petrol, then he spent what average cost of petrol per litre for the three years?a)Rs 20b)Rs 25.3c)Rs 28.2d)Rs 21.7e)None of theseCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Quant 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for For three successive years, the cost of petrol were Rs 20 per litre, Rs 22 per litre and Rs 23.50 per litre respectively. If a man spent an average of Rs 8000 per year on petrol, then he spent what average cost of petrol per litre for the three years?a)Rs 20b)Rs 25.3c)Rs 28.2d)Rs 21.7e)None of theseCorrect answer is option 'D'. Can you explain this answer?.
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