1.

A boy walking at a speed of 10 km/hr reaches his school 15 minutes late. Next time his speed increase by 2 km/hr, but still he is late by 5 minutes. Find the distance of his school from his house.     

A.  20 km    
B.  30 km
C.  10 km    
D.  5 km
Answer» D.  5 km


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