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.

  1. 2.5 km
  2. 3 km
  3. 3.5 km
  4. 4 km
Monis Rasool Professor Asked on 25th May 2015 in Maths.
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1 Answer(s)

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

Anurag Mishra Professor Answered on 25th May 2015.
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