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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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The correct Answer is:
12 years and 6 years
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NAGEEN PRAKASHAN-QUADRATIC EQUATIONS-Exercise 4d
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  2. A chess board contains 64 equal squares and the area of each square...

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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. The product of Ramus age (in years) five years ago with his age (in ...

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  5. Mrs. Mehra has two sons, one being exactly one year older than the oth...

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  6. The sum of ages of a boy and his brother is 25 years, and the product ...

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  7. A takes 6 days less than the time taken by B to finish a piece of work...

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  8. One pipe can fill a cistren in 3 hours less than the other. The two pi...

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  9. A train travels a distance of 300km at constant speed. If the speed of...

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  10. A plane left 30 minutes late than its scheduled time and in order to r...

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

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  12. Car A travels x km for every litre of petrol, while car B travels (x+5...

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  13. The distance by road between two towns A and B, is 216km , by rail it ...

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  14. The speed of a boat in still water is 15 km/hr. It can go 30 km ups...

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  15. The speed of a boat in still water is 9 km/hr. It can go 12 km upstrea...

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  16. Swati can row her boat at a speed of 5km/hr in still water. if it take...

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  17. A trader bought a number of articles for RS.1200. Ten were damaged and...

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  18. Mohan sold an article for RS.56 which coste him RS.x. He finds that he...

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  19. A shopkeeper buys a certain number of books for RS.960 would be 4 more...

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  20. The hotel bill for a number of people for overnight stay is RS.4800. I...

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