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The speed of a boat in downstream is 4 km/h and the speed of the current is 1 km/h. Find the speed of boat in upstream.1. 3 km/h2. 4 km/h3. 2 km/h4. 5 km/h |
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Answer» Correct Answer - Option 3 : 2 km/h Given: Downstream speed = 4 km/h Speed of current = 1 km/h Formula used: Speed of current = (Downstream speed – Upstream speed)/2 Calculation: 1 = (4 – Upstream speed)/2 ⇒ Upstream speed = 4 - 2 = 2 ⇒ Upstream speed = 2 km/h |
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