Given the total number of kilometres travelled, including the trip = is 26862 Km, and the duration of the trip is 8 hrs. If avg. speed of the car during the trip is 's' ⇒ the km travelled till just before the trip is 26862 - 8s, which should also be a palindrome. ⇒ From the options if s=110⇒ The reading will be 26862−110⋆8=25982 (Not a palindrome) ⇒ If s=100⇒ The reading will be 26862−100*8=26062⇒ It is a palindrome. ⇒s=100 is the correct option.