A person can row a boat d km upstream and the same distance downstream in 5 hour

Question

A person can row a boat d km upstream and the same distance downstream in 5 hours 15 minutes. Also, he can row the boat 2d km upstream in 7 hours. How long will it take to row the same distance 2d km downstream?

Options:

A . $$\frac{{3}}{{2}}$$ hours

B . 7 hours

C . $$\frac{{29}}{{4}}$$ hours

D . $$\frac{{7}}{{2}}$$ hours

Answer: Option D

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