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  • 13-08-2018
  • Mathematics
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AREAS AND VOLUMES OF SIMILAR SOLIDS URGENT?

AREAS AND VOLUMES OF SIMILAR SOLIDS URGENT class=

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frika
frika frika
  • 13-08-2018

Similar cones have proportional dimensions:

[tex] k=\dfrac{3}{2} [/tex].

If the surface area of large cone is 75 sq. cm, then

[tex] \dfrac{SA_{large}}{SA_{small}}= k^2,\\ \dfrac{75}{SA_{small}}= (\dfrac{3}{2})^2=\dfrac{9}{4},\\ SA_{small}=\dfrac{75\cdot 4}{9} =33.333\approx 33.3 [/tex] sq. cm.

Answer: 33.3 sq. cm.

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