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A girl is twice as old as her sister. Fo...

A girl is twice as old as her sister. Four years hence, the product of their ages (in years) will be 160. Find their present ages.

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RD SHARMA ENGLISH-QUADRATIC EQUATIONS-All Questions
  1. The product of Ramu's age (in years) five years ago with his age (in ...

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  2. One year ago, a man was 8 times as old as his son. Now his age is equa...

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  3. A girl is twice as old as her sister. Four years hence, the product of...

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  4. Seven years ago Varun’s age was five times the square of Swati’s age. ...

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  5. While boarding an aeroplane, a passenger got hurt. The pilot showing p...

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  6. While boarding an aeroplane, a passenger got hurt. The pilot showing p...

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  7. A motor boat whose speed is 18 km/h m still water takes 1 hour more...

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  8. about to only mathematics

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  9. Solve for: 4/x-3=5/(2x+3),x!=0,,-3/2

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  10. Solve for x: (x-4)/(x-5)+(x-6)/(x-7)=10/3; x!=5,7

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  11. Solve for : (5+x)/(5-x)-(5-x)/(5+x)=3 3/4; x!=5,-5

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  12. Solve for : 3/(x+1)-1/2=2/(3x-1),x!=3/5,-1/7

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  13. Solve for : 2/(x+1)+3/(2(x-2))=(23)/(5x);x!=0,-1,2

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  14. Find the roots of the following equation 4x^2+4b x-(a^2-b^2)=0 by the ...

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  15. Find the roots of the equation a^2x^2-3a b x+2b^2=0 by the method of c...

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  16. Solve the equation x^2-(sqrt(3)+1)x+sqrt(3)=0 by the method of complet...

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  17. Find the roots of the quadratic equations (if they exist) by the metho...

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  18. Find the roots of the quadratic equations (if they exist) by the metho...

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  19. If the roots of the equation x^2+2c x+a b=0 are real unequal, prove th...

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  20. If p , q , ra n ds are real numbers such that p r=2(q+s), then show th...

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