A robbery was done at a shop.  The shop is 1125 m away from a policeman.  Thief starts running at x km/h and policeman starts chasing at 11 km/h at the same time.  The policeman caught the thief in 1620 sec.  What is the distance run by the thief?

3825 m

Policeman has to run 1125 m distance extra

distance travelled by Policeman = 11 × \(\frac{5}{18}\) × 1620 = 11 × 5 × 90 

Distance travelled by thief = 11 × 5 × 90 - 1125 = 3285 m