6. A car owner buys petrol at ₹ 17, ₹ 19 and ₹ 20 per litre for three consecutive years. Compute the average cost per litre, fi he spends ₹ 6460 per year.

1. ₹ 18.49

2. ₹ 18.58

3. ₹ 19.20 

4. ₹ 21.66

Correct Answer :

₹ 18.58