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A boat goes (48) km downstream. Its speed in still water is (x) km per hour and stream speed is (4) km per hour. If time is (4) hours, what is (x)?

Answer and explanation

Correct answer: (8)

Downstream speed is (x+4), and (4(x+4)=48), so (x=8). In boat problems, speed changes with direction.

Related tags

Quadratic EquationsBoat StreamApplicationWord Problems And ApplicationsMathematicsClass 10 Mcq

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