Download Aptitude Crack
img not found img not found

Problems on Trains

Each of the questions given below consists of a question followed by three statements. You have to study the question and the statements and decide which of the statement(s) is/are necessary to answer the question.
Q1:

What is the speed of the train?  I. The train crosses a tree in 13 seconds.  II. The train crosses a platform of length 250 metres in 27 seconds.  III. The train crosses another train running in the same direction in 32 seconds.

A I and II only

B II and III only

C I and III only

D Any two of the three

E None of these

ANS:A - I and II only

Let the speed of the train be x metres/sec.

Time taken to cross a tree = Length of the train
Speed of the train
Time taken to cross a platform = (Length of the train + Length of the Platform)
Speed of the train
I gives, 13 = l      13x.
x
II gives 27 = l + 250
x
13x + 250 = 27
x
 x = 125 m/sec.
7
Thus I and II give the speed of the train.  The correct answer is (A.)



img not found
img

For help Students Orientation
Mcqs Questions

One stop destination for examination, preparation, recruitment, and more. Specially designed online test to solve all your preparation worries. Go wherever you want to and practice whenever you want, using the online test platform.