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A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream.1. 4 hrs2. 5 hrs3. 2 hrs4. 3 hrs |
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Answer» Correct Answer - Option 1 : 4 hrs Given: Speed of the boat in still water = 13 km/h Speed of the stream = 4 km/h Formulas used: Downstream (Speed) = Speed of the boat + Speed of the current Time = Distance/Speed Calculation: Time = 68/(13 + 4) ⇒ 68/17 = 4 hours ∴ The required time = 4 hours |
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