Deepa drove from Chapra to Patna and back again, What was her average speed for the entire trip?
I. She drove from Chapra to Patna in 3 hr. and the return trip took `2(1)/(2)` hr.
II. The distance between Chapra and Patna is 200 miles.

Options

A. If statement (I) alone is sufficient to answer the question.
B. If statement (II) alone is sufficient to answer the question.
C. If either (I) or (II) alone is sufficient to answer the question.
D. If both statements (I) and (II) taken together are sufficient to answer the question.

Answer

D

Explanation

In this question, statement I is not sufficient to answer, because we have no information regarding the distance travelled.
Statement II gives us the distance only, and not the time.
However, statements I and II together give us the total distance and total time, using which, average speed can be found.
Therefore, the correct answer choice is (d).