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If the inner and outer radii of a hollow sphere are r unit and R unit, then the volume of hollow sphere is `4/3 pi(R^3-r^3)` c.unit.

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UNITED BOOK HOUSE-TAMLUK HAMILTON HIGH SCHOOL-EXERCISE
  1. Write True or False Maximum four common tangents can draw to two cir...

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  2. Write True or False Trigonometrical angle may be less than 0^@, not ...

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  3. Write True or False If the inner and outer radii of a hollow sphere ...

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  4. Write True or False If n is even then (n+1)/2th term is the median.

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  5. In a business, the ratio of investment of A and B is 3:2. 5% of total ...

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  6. If a/2=b/3=c/5=(3a-5b+4c)/(K) then find the value of K.

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  7. Find the quadratic equation whose one of the root is 2+sqrt5.

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  8. In trapezium ABCD, BC||AD and AD = 4cm. Diagonals AC and BD intersect...

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  9. The lengths of radii of two circles are 8 cm and 3 cm and the distance...

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  10. In a isoscles triangle ABC, AB = AC. If we draw a circle with diamete...

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  11. If 2 sin theta cos theta = 1, then find the value of sin theta-cos the...

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  12. If tan50^@=x and cot(theta+5^@)=1, then find the value of sec(90^@-the...

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  13. The length of radius of a right circular cylinder is decreased by 50% ...

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  14. Curved surface area and volume of a solid sphere are S and V respectiv...

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  15. If ui = (xi-25)/10, sumfiui = 20 and sumfi = 100 then find the value o...

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  16. Rameshbabu deposits Rs 3,70,000 in total in three banks. The rates of ...

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  17. Tow friends start a partnership business investing ₨. 40,000 and ₨. 50...

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  18. Solve: a/(ax-1)+b/(bx-1)=a+b (x!=1/a,1/b).

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  19. If 2x = sqrta+1/sqrta. Show that sqrt(x^2-1)/(x-sqrt(x^2-1))(a-1)

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  20. x varies directly with y and inversely with z. When y =5, z= 9 then x=...

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