A car owner buys a petrol at rupees 75, rs 85,rs 95 per litre for three successive years what approximately is his average cost per litre of petrol if he spend rupees 36000 each year
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Answer:
Total quantity of petrol consumed in 3 years =(
7.50
4000
+
8
4000
+
8.50
4000
)litres
=4000(
15
2
+
8
1
+
17
2
)litres
=(
51
76700
)litres
Total amount spent =Rs.(3×4000)=Rs.12000.
∴ Average cost =Rs.(
76700
12000×51
)=Rs.
767
6120
=Rs.7.98
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