1.

A person travels from X to Y and back again. How long wil it take in travelling both the ways by bus? A. It takes 21 hours in travelling form X to Y by train and returing by bus. II. The distance between X and Y is 648 km. C. A person can save 3 hours if he travels both the ways by train as compared to travelling by bus on the one side and returning by train.A. Only A and C togetherB. B and either A or CC. Any two of themD. All statements are necessary

Answer» Correct Answer - D
From statement (A) and (C ),
The person will take `(21-3)=18` hrs, if he travels both ways by train. So it takes `((18)/(2)=9)` hrs if he travels one way by train. Hence, he will take `(9+3)=12` hrs if he travels one way by bus.
So, required time `=12xx2=24` hrs.


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