Subject
Quantitative Aptitude
Topic
Average
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 ?
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 ?
ক)
6.23খ)
7.98গ)
8.97ঘ)
9.89Explanation
Total quantity of petrol consumed in 3 years =(4000/7.50+4000/8+4000/8.50) liters = 4000(2/15+1/8+2/17) liters = 76700/51 liters Total amount spent = Rs. (3 x 4000) = Rs. 12000 Average cost = Rs. (12000*51/76700) = Rs. 7.98.Related questions
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