Question

Arun can cover a certain distance between his home and office on cycle moving at a speed of 30km/h. He is late by 10 minutes. However with the speed of 40 km/hr he reached his office 5 minutes earlier. Find the distance between house and office?

• A. 10km
• B. 30km
• C. 20km
• D. 50km

Answer 1

Answer:

B. 30km

Let, the distance between his house and office is X km. When he covers 30 km/h He covers Xkm in X/30 hours Similarly, When he covers 40 km/h He covers Xkm in X/40 hours (X/30) - (X/40) = 15/60 hrs X = 30 km