A taxi owner buys diesel at Rs.8.50, Rs. 9 and Rs. 9.50 per litre for three successive years. What approximately is the average cost per litre of diesel if he spends Rs. 5000 each year?  Choose the correct choice from the following choices:
A) 7.98  B) 8.98  C) 9.98  D) 6.98  E) 8.12
Total Cost = 5000 × 3=15000   Total diesel used = 5000/8.50 + 5000/9 +5000/9.50   =588+555+527= 
<gadget id="calculator">588+555+527</gadget>
<output>1_670</output>
1670   Average cost per litre of diesel=15000/1670   =8.98   ANSWER:8.98
<result>B</result>
A taxi owner buys diesel at Rs.8.50, Rs. 9 and Rs. 9.50 per litre for three successive years. What approximately is the average cost per litre of diesel if he spends Rs. 5000 each year?