How much time will Dinesh take to walk a 10 km distance?
I. The ratio of the speeds at which Dinesh and Ranjay walk is `5:6.`
II. The average walking speed of Dinesh and Ranjay is known.

Options

A. if the data in statement I alone are sufficient to answer the questin, while the data in statement II alone are not sufficient to answer the question.
B. if the data in statement II alon are sufficient to answer the question, while the data in statement I alone are not sufficient to answer the question.
C. if the data either in statement I alone or in statement II alone in sufficient to answer the question.
D. if the data in both the statements I and II together are necessary to answer the question.

Explanation

Combining I & II, we get speed of Dinesh and thus time can be calculated.