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A boat goes up-stream 30 kilometres and ...

A boat goes up-stream 30 kilometres and down-stream 44 kilometres in 10 hours, it also goes up-stram 40 kilometres and down-stream 55 kilometres in 13 hours. Find the speed of the stream and of the boat.

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The correct Answer is:
Speed of stream =3 km/hr and speed of boat =8 km/hr,
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CALCUTTA BOOK HOUSE-QUADRATIC EQUATION IN ONE VARIABLE-EXERCISE-1.3
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  4. If 1 is subtracted from the numerator and 2 is added to the denomenato...

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  5. If 2 is subtracted from the numerator and 3 is added to the demoenator...

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  6. A two digits number is 3 times of the sum of its digits. If the digits...

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  7. If the digits of a two digits' number are interchanged, then the numbe...

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  8. The tens' digit of a two digits number is twice of its unit digit. If ...

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  9. If a two digits' number is divided by the sum of digits, the quotient ...

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  10. Rahul said to Rohan. ''I am twice as old as you were when I was as old...

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  11. Fill the blank: Roots of the equation x^2=6x are

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  12. A man rowing at the rate 4 km an hour takes thrice as much time to go ...

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  13. A boat goes up-stream 30 kilometres and down-stream 44 kilometres in 1...

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  14. A boy was aksed to add 3 to a certain number and to divide the sum by ...

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  15. Milk and water are mixed in two pots at the ratios 2:3 and 5:4. In wha...

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  17. The three sides of a triangle are (x+5), (4x-y) and (y+2) centimetres ...

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  18. If the length of a rectangle is decreased by 5 metres and the breadth ...

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  19. The monthly income of two brothers is RS 1550. One of them gives half ...

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  20. The total monthly salary of two persons is RS 7500. They spend 90% and...

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