4 4 votes A car owner buys petrol at $\text{Rs. }7.50, \text{Rs. }8$ and $\text{Rs. }8.50$ per litre for three successive years. What approximately is the average cost per litre of petrol if he spends $\text{Rs. }4000$ each year? $\text{Rs. 7.98}$ $\text{Rs. 6}$ $\text{Rs. 9.50}$ $\text{Rs. 9.5}$ Quantitative Aptitude nielit2016mar-scientistc quantitative-aptitude average + – Lakshman Bhaiya 12.2k points 2.8k views answer comment Share Follow Print 0 reply Please log in or register to add a comment.
3 3 votes Answer is A. No of litres bought in 3 years = $(4000/7.5)+(4000/8)+(4000/8.5)$ Total amount spent in buying petrol in 3 years = 4000*3 Average cost per litre of petrol in 3 years = $(4000*3)/[(4000/7.5)+(4000/8)+(4000/8.5)] = 7.979$ ~ Rs.7.98 neethu_seb answered Dec 10, 2022 neethu_seb 3.3k points comment Share Follow 0 reply Please log in or register to add a comment.