1.

The speed of a boat downstream is 2.5 times its speed upstream. If the total time taken by the boat for going 15 km downstream and the distance upstream is \(4\frac{2}{3}\) hours, then what is the speed (in km/h) of the boat downstream?

A. \(11\frac{1}{2}\)
B. \(11\frac{1}{4}\)
C. \(10\frac{5}{8}\)
D. 10
Answer» C. \(10\frac{5}{8}\)


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