On a certain day x drives his car from his home at the rate of 20 Km/litr and reaches his office 10 minutes late. The next day he drives at 30 Km/hr and reaches his office 5 minutes early. Calculate the distance between X's home and office in Km?

A     17.5

B    none of

C    15

D    12

Solution

Correct Answer: Option C

 

x/20-2/30=15/60

x=15

 

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