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A wire of length 28 m, is to be cut into...

A wire of length 28 m, is to be cut into two pieces. One of the pieces is to be made into a square and the other into a circle. What should be the length of the two pieces so that the combined area of the square and the circle is minimum ?

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The correct Answer is:
`(28pi)/(4+pi)m` and `(112)/(4+pi)m`.
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KUMAR PRAKASHAN-APPLICATION OF DERIVATIVES -EXERCISE - 6.5
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  7. Find two positive numbers x and y such that their sum is 35 and the pr...

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  8. Find two positive numbers whose sum is 16 and the sum of whose cubes i...

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  9. A square piece of tin of side 18 cm is to be made into a box without t...

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  10. A rectangular sheet of tin 45 cm by 24 cm is to be made into a box wit...

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  11. Show that of all rectangles inscribed in a given fixed circle, the squ...

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  12. Show that the right circular cylinder of given surface and maximum vol...

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  13. Of all the closed cylindrical cans (right circular), of a given volume...

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  14. A wire of length 28 m, is to be cut into two pieces. One of the pieces...

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  15. Prove that the volume of the largest cone that can be inscribed in a s...

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  16. Show that the right circular cone of least curved surface and given vo...

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  17. Show that the semi-vertical angle of the cone of the maximum volume an...

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  18. Show that semi - vertical angle of right circular cone of given surfac...

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  19. The point on the curve x^(2)=2y which is nearest to the point (0, 5) i...

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  20. For all real values of x, the minimum value of f(x)=(1-x+x^(2))/(1+x+x...

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