Time and Distance

Two cars pass each other in opposite direction. How long would they take to be 500 km apart? I. The sum of their speeds is 135 km/hr.  II. The difference of their speed is 25 km/hr.

A.I alone sufficient while II alone not sufficient to answer

B.II alone sufficient while I alone not sufficient to answer

C.Either I or II alone sufficient to answer

D.Both I and II are not sufficient to answer

E.Both I and II are necessary to answer

Show Answer

Answer=Option A

The towns A, B and C are on a straight line. Town C is between A and B. The distance from A to B is 100 km. How far is A from C? I. The distance from A to B is 25% more than the distance from C to B.  II. The distance from A to C is   of the distance C to B.

A.I alone sufficient while II alone not sufficient to answer

B.II alone sufficient while I alone not sufficient to answer

C.Either I or II alone sufficient to answer

D.Both I and II are not sufficient to answer

E.Both I and II are necessary to answer

Show Answer

Answer=Option C

Two towns are connected by railway. Can you find the distance between them? I. The speed of the mail train is 12 km/hr more than that of an express train.  II. A mail train takes 40 minutes less than an express train to cover the distance.

A.I alone sufficient while II alone not sufficient to answer

B.II alone sufficient while I alone not sufficient to answer

C.Either I or II alone sufficient to answer

D.Both I and II are not sufficient to answer

E.Both I and II are necessary to answer

Show Answer

Answer=Option D