**Answer:** Option** C **

**Explanation:**

Total distance travelled in 12 hours = (35 + 37 + 39 + ---- upto 12 terms).

This is an A.P :

First term, a = 35,

Number of terms, n = 12,

Common difference, d = 2.

∴ Required distance = 12/2 [2 x 35 + (12-1) x 2]

= 6 (70 + 22 )

= 552 km