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A motor boat heads upstream a distance o...

A motor boat heads upstream a distance of 24 km in a river whose current is running at 3 km per hour. The trip up and back takes 6 hours. Assuming that the motor boat maintained a constant speed, what was its speed in still water?

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The correct Answer is:
9 kmph
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NCERT TAMIL-QUADRATIC EQUATIONS-EXERCISE - 5.2
  1. Find the roots of the quadratic equations by factorisation: x^(2)-3...

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  2. Find the roots of the quadratic equations by factorisation: 2x^(2)+x...

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  3. Solve the following quadratic equations by factorization method. sqr...

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  4. Find the roots of the quadratic equations by factorisation: 2x^(2)-x...

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  5. Find the roots of the quadratic equations by factorisation: 100x^(2)...

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  6. Find the roots of the quadratic equations by factorisation: x(x+4)=1...

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  7. Find the roots of the quadratic equations by factorisation: 3x^(2)-5...

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  8. Find the roots of the quadratic equations by factorisation: x-(3)/(x...

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  9. Find the roots of the quadratic equations by factorisation: 3(x-4)^(...

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  10. Find two numbers whose sum is 27 and product is 182.

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  11. Find two consecutive positive integers, sum of whose squares is 613.

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  12. The altitude of a right triangle is 7 cm less than its base. If the hy...

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  13. A cottage industry produces a certain number of pottery articles in a ...

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  14. Find the dimensions of a rectangle whose perimeter is 28 meters and wh...

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  15. The base of a triangle is 4cm longer than its altitude. If the area of...

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  16. Two trains leave a railway station at the same time. The first train t...

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  17. In a class of 60 students, each boy contributed rupees equal to the nu...

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  18. A motor boat heads upstream a distance of 24 km in a river whose curre...

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