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?

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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?

A10km

B30km

C20km

D50km

Answer:

B. 30km

Read Explanation:

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

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