Question

By substituting the value
Number = 80 - 9 * 5 = 80 - 45 - 35.
mple 16: A motorboat goes down stream in a river
and covers the distance between two
coastal towns in five hours. It covers
this distance upstream in six hours. If
the speed of the stream is 2 km/hour
find the speed of the boat in still water.
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Answer 1

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