# Find the Distance of His Office from His House.

Walking at 4 km/hr. a clerk reaches his office 5 min. late. If he walks at 5 km/hr. he will be 2.5 min. early. Find the distance of his office from his house.

- 2.5 km
- 3 km
- 3.5 km
- 4 km

**Answer: 2.5 km
Explanation:-**

Let be the distance = X km

According to question, X/4 + 5/60 = X/5 – 2.5/60

X/4 – X/5 = – 2.5/60 – 5/60

X/20 = – 7.5/60

X = -7.5 X 20/60

X = 2.5 (distance is never considered in negative)

Hence, the distance of his office from home = 2.5 km