Read the two statements and choose the correct option.
I. When a stream flows, a boat's speed downstream is always greater than its speed upstream.
II. If the stream flows as fast as the boat moves in still water, the boat cannot make any headway upstream.

Only ICorrect answerYour answerOnly IICorrect answerYour answerBoth I and IICorrect answerYour answerNeither I nor IICorrect answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer C

Correct answer: C

I: $b + s > b - s$ whenever $s > 0$ . True.
II: upstream speed $= b - s = 0$ when $s = b$ , so the boat stays where it is. True.

Ten questions from Boats & Streams, Pipes & Cisterns, at your own pace.

Ten questions from Boats & Streams, Pipes & Cisterns, at your own pace.

Read the two statements and choose the correct option.I. When a stream flows, a boat's speed downstream is always greater than its speed upstream.II. If the stream flows as fast as the boat moves in still water, the boat cannot make any headway upstream.