A taxi charges a minimum fixed amount for first 2 km and after this, the charge is proportional to

A taxi charges a minimum fixed amount for first 2 km and after this, the charge is proportional to the distance travelled. If a man pays ₹63 for10 km and another man pays ₹93 for 15 km . Then fixed charge and the charge per km is :
(i) Rs.15 & Rs.6 (ii) Rs.6 & Rs.15 (iii) Rs.8 & Rs.9 (iv) none of these