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Question

What is the length of a running truck?

I. The truck crosses a woman in 13.5 seconds.

II. The truck crosses a 360 metre long platform in 36 seconds.



Your Answer
A

if the data in Statement I alone are sufficient to answer the question, while the data in Statement II alone are not sufficient to answer the question.

Your Answer
B

if the data in Statement II alone are sufficient to answer the question, while the data in Statement I alone are not sufficient to answer the question.

Your Answer
C

if the data either in Statement I or in Statement II alone are sufficient to answer the question.

Your Answer
D

if the data even in both Statements I and II together are not sufficient to answer the question.

Correct Answer
E

if the data in both Statements I and II together are necessary to answer the question.


Solution

The correct option is A

if the data in both Statements I and II together are necessary to answer the question.


Time taken by truck to cross a woman =Length of truckSpeed of truckSpeed=l13.5 ..... (i)

Time taken by truck to cross =(Length of truck+Length of platform)Speed of the truck

Speed=l+36036 .....(ii)  

From (i) and (ii), we get l13.5=l+36036.

Thus, length can be obtained. So both I and II are necessary to get the answer.

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