A man is walking at a speed of 10 km per hour. After every kilometre, he takes rest for 5 minutes. How much time will be take to cover a distance of 5 kilometres? Choose the correct choice from the following: A) 48 min . B) 50 min . C) 45 min . D) 55 min . E) none of these

Rationale: rest time = number of rest × time for each rest = 4 × 5 = 20 minutes total time to cover 5 km = ( 5 ⁄ 10 × 60 ) minutes + 20 minutes = 50 minutes answer b
Answer: B