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A Motor boat’s speed in still water is 18 km/h. What will be the downstream speed of the motorboat, when the river is flowing at a speed of 12 km/h.1. 15 km / h2. 25 km / h3. 30 km / h4. 35 km / h5. 40 km / h |
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Answer» Correct Answer - Option 3 : 30 km / h Given: Speed of Motorboat in still water (x) = 18 km/h Speed of River (y) = 12 km/h Formula Used: Speed Downstream = (x + y) Calculations: Speed of motorboat in still water (x) = 18 km/h Speed of River (y) = 12 km/h ∴ Downstream Speed of the motorboat = (x + y) ⇒ 18 + 12 ⇒ 30 km/h The downstream speed of the motorboat is 30 km/h. |
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