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 |
|
||||||||||||
|
|||||||||||||
|
Total amount spent = Rs. (3 x 4000) = Rs. 12000.
 Average cost = Rs. |
 |
12000 x 51 |  |
= Rs. | 6120 | = Rs. 7.98 |
| 76700 | 767 |
Discussion:
92 comments Page 6 of 10.
Arif islam said:
8 years ago
Thanks @Krishna.
Harika said:
8 years ago
Nice explanation @Krishna.
Mizanur Rahman said:
8 years ago
Thanks @Krishna.
Pratik said:
8 years ago
Thanks for the given explanations.
Rajeshwar Singh said:
8 years ago
Hi, everyone the best way to solve the equation is we having value 7.50, 8, 8.50.
For those value whose in the decimal format we wl divide by as per req we wl divide 7.50/100 and there is no need for 8 wl do for 8.50/100 nw we calculate like that 4000(1/7.5+1/8+1/8.5).
4000(100/7.5+1/8+100/8.5).
This will get the value.
For those value whose in the decimal format we wl divide by as per req we wl divide 7.50/100 and there is no need for 8 wl do for 8.50/100 nw we calculate like that 4000(1/7.5+1/8+1/8.5).
4000(100/7.5+1/8+100/8.5).
This will get the value.
Swapn said:
8 years ago
It's a difficult calculation done here
Ganesh said:
8 years ago
Thanks @Krishna.
Mani said:
8 years ago
Answer is very simple when cost is equal in all year, the unit of cost should be average.
Mahadeb said:
8 years ago
Thanks for the explanation.
Mass said:
7 years ago
Here, the Question should be what is the average cost he spent per litre of petrol if he spends 4000 each year? Not the average cost of petrol?
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers