Ajay can walk 4km in 1 hour. In how many hours he can walk 40km?  Choose the most appropriate option
A) 5 hrs B) 10 hrs C) 15 hrs D) 20 hrs E) 30 hrs

Rationale: "1 hour he walk 4 km he walk 40 km in = 40 / 4 * 1 = 10 hours answer is b"
Answer: B