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If two solid spheres with the radii of 1 cm and 6 cm lengths are melted and a hollow sphere with the thickness of 1 cm is made, calculate the outer curved surface area of the hollow sphere.

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UNITED BOOK HOUSE-GARDEN REACH BIHARI DAS GIRL'S -EXERCISE
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  2. If x/y= (a+2)/(a-2) show that (x^2-y^2)/(x^2+y^2)=(4a)/(a^2+4)

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  3. Answer any one : If a/b+c = b/c+a = c/a+b, then prove that each ratio...

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  7. AC is a diamter of a circle with centre O, If triangleABC is cyclic an...

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  8. Construct an equilateral triangle with side 6 cm. Draw the in circle o...

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  9. Draw a cricle with centre at O having the length of radius 2.5 cm. Tak...

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  10. Find the value of sin^2 pi/3-sec^2 pi/4-cosec^2 pi/4+ cot pi/4.

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  18. If the median of the given data is 32, then find the value of x and y ...

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  19. Find the mean of the following frequency distribution table.

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