RRB NTPC · Question 28
Monica takes 9 hrs 15 minutes in walking a distance and riding back to the same place where she started. She could walk both ways in 11 hrs 12 minutes. The time taken by her to ride back both ways is: A. 7 hrs 18 min B. 7 hrs 35 min C. 7 hrs 45 min D. 7 hrs 15 min
Show answer & explanation
Answer: (B) A
Explanation
Walking both ways takes 11 h 12 min, so walking one way takes 5 h 36 min. Walking one way plus riding back takes 9 h 15 min, so riding one way = 9 h 15 min − 5 h 36 min = 3 h 39 min. Riding both ways = 2 × 3 h 39 min = 7 h 18 min.