A man’s rate with the current is 12 km/h; the current is 1.5 km/h. Find his rate against the current.

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Solve this multiple-choice question and choose the correct option.

Accepted Answer

Introduction / Context:With-current and against-current speeds differ by twice the stream speed around the still-water rate. Given Data / Assumptions: b + s = 12 km/h; s = 1.5 km/h. Concept / Approach:Compute still-water b, then subtract s to get upstream. Step-by-Step Solution: b = 12 − 1.5 = 10.5 km/h; upstream = b − s = 10.5 − 1.5 = 9 km/h. Final Answer:9 km/hr

A man’s rate with the current is 12 km/h; the current is 1.5 km/h. Find his rate against the current.

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