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Class 10MathematicsQuadratic EquationsWord Problems and ApplicationsExpertLevel 40
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A boat goes (216) km downstream. Its speed in still water is (x) km per hour and stream speed is (5) km per hour. If time is (8) hours, what is (x)?

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Answer and explanation

Correct answer: (22)

Downstream speed is (x+5), and (8(x+5)=216), so (x=22). In boat problems, speed changes with direction.

Related tags

Quadratic EquationsBoat StreamApplication

Frequently asked questions

What is the correct answer to this question?

(22)

Why is this the correct answer?

Downstream speed is (x+5), and (8(x+5)=216), so (x=22). In boat problems, speed changes with direction.

Which subject and chapter does this question cover?

This is a Class 10 Mathematics question. Chapter: Quadratic Equations. Topic: Word Problems and Applications.

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