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The area of a circle (A) varies directly...

The area of a circle (A) varies directly as the square of its radius. The area of the circle of radius 7 cm is 154 `cm^(2)`. What is the area of the circle of radius 35 cm?

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The correct Answer is:
3850 `cm^(2)`
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PEARSON IIT JEE FOUNDATION-RATIO, PROPORTION AND VARIATION-CONCEPT APPLICATION
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  3. in an ofice, the ratio of the salary of an officer to that of a clerk ...

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  4. In the previous problem, what is the salary of the clerk?

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  5. In a class, there are 225 students. Which of the following cannot be t...

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  6. A sum off Rs 4680 was divided among Parthu, Kunti and Arjun in the rat...

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  7. If 9:12(2)/(3)=81:(x+2) ,then what is the value of x?

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  8. Rs 117 was supposed to be divided among P, Q and R in the ratio 3:4:6....

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  9. In a bag, the number of Rs 10 notes, Rs 20 notes and Rs 50 notes are i...

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  10. If x:y=3:2 then find (4x+5y):(2x+7y).

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  11. If (b+a)/(b-a)=11/5, find the value of a/b.

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  12. Present ages of A and B are in the ratio 7:4, which of the following c...

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  13. Which of the following will result in 10,20,19 and 40 being in proport...

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  14. if (x+y)/(x+y+z)=(y+z)/(x+y+z)=(x+z)/(x+y+z)=p, then which of the foll...

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  15. if x=(a-b)/(a+b+c+d)=(b-c)/(a+b+c+d)=(c-d)/(a+b+c+d) =(d-a)/(a+b+c+d...

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  16. if the ratio of the ages (in years) of A and B, 5 years ago was 5:7, t...

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  17. One day, the ratio of the number of first class and second class passe...

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  18. In a bag, the numbers of Re 1 coins, 50 paise coins and 25 paise coins...

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  19. Incomes of A and B are Rs 3500 and Rs 4200 respectively. The ratio of ...

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  20. if the ratio of the ages (in years) of x and y, 8 years ago is 7:6, th...

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  21. If P:Q:R=2:3:4 and P^(2)+Q^(2)+R^(2)=11600, then find (P+Q-R)

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