Aptitude - Average - Discussion
Discussion Forum : Average - General Questions (Q.No. 9)
9.
A car owner buys petrol 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 petrol if he spends Rs. 4000 each year?
Answer: Option
Explanation:
| Total quantity of petrol consumed in 3 years |
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Total amount spent = Rs. (3 x 4000) = Rs. 12000.
 Average cost = Rs. |
 |
12000 x 51 |  |
= Rs. | 6120 | = Rs. 7.98 |
| 76700 | 767 |
Discussion:
93 comments Page 10 of 10.
Smiley said:
1 decade ago
Can anyone explain this 2/15+1/8+2/17 how it is?
Prini said:
1 decade ago
Here the question is cost per litre.
So ans = (total cost for 3 years)/(total litres consumed)
= (4000*3)/total petrol litres consumed.
this is the logic.
So ans = (total cost for 3 years)/(total litres consumed)
= (4000*3)/total petrol litres consumed.
this is the logic.
Lalli said:
1 decade ago
Why the 5/18 is divided often, and it can be explained briefly.
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