Ajay can ride 50km in 1 hour. In how many hours he can ride 1000km?
Choose the correct choice
A) 10 hrs  B) 15 hrs  C) 20 hrs  D) 25 hrs  E) 18 hrs

Rationale: "1 hour he ride 50 km he ride 1000 km in = 1000 / 50 * 1 = 20 hours answer is c"
Answer: C