Directions : Below is given a question followed by two statements numbered I and II. The question may be or may be not answered with the help of these statements. You have to decide If these statements are sufficient to answer the the questions. Give answer
What is the speed of train A?
Statements: I. It crosses a bridge in 5 seconds.
II. The train is 200 m long.

Options

A. if only statement I is sufficient but statement II is not,
B. If only statement II is sufficient but statement I is not,
C. if both statements I and II are together sufficient to answer the questions although neither statement suffices by itself,
D. if the two statement are not sufficient but still more data is needs to answer the question.

Answer

D

Explanation

We cannot find the speed of the train from the given data. To find an answer to this question we will also need to know the length of the bridge. When a train crosses a bridge it covers a distance which is equal to the sum of the length of the train and that of the bridge. Since the length of the bridge is not given, the information is incomplete.