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If four times the sum of the areas of...

If four times the sum of the areas of two circular faces of a cylinder of height 8 cm is equal to twice the curve surface area, then diameter of the cylinder is (a) 4 cm     (b) 8 cm     (c) 2 cm      (d) 6 cm

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RD SHARMA ENGLISH-SURFACE AREAS AND VOLUMES-All Questions
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  12. The diameters of the ends of a frustum of a cone are 32 cm and 20 cm...

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  13. A solid frustum is of height 8 cm. If the radii of its lower and upp...

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  14. The radii of the ends of a bucket 16 cm high are 20 cm and 8 cm. Th...

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  15. The diameters of the top and the bottom portions of a bucket are 42 cm...

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  17. If the radius of the base of a right circular cylinder is halved, k...

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  19. A rectangular sheet of paper 40 c mxx22 c m , is rolled to form ...

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