anonymous
  • anonymous
A cube is cut into smaller cubes such that each edge if cube is increased by 50% ,find the % increase in surface area?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
(A) 200% (B) 100% (C) 125% options
marigirl
  • marigirl
each edge OF cube is increased by 50%?
anonymous
  • anonymous
yup dr

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More answers

anonymous
  • anonymous
well, then increase of 50% means that new edge is 1.5 times the older one.
anonymous
  • anonymous
how u get that @decidedlypretentious
anonymous
  • anonymous
\[x + 50/100 x = 150/100x\]
anonymous
  • anonymous
btw, have a lookie at your question again, does it say decreased or increased? cause if its cut into smaller cubes... ehh
anonymous
  • anonymous
question is lyk dat only
anonymous
  • anonymous
Assuming the question doesn't mean the first bit.
anonymous
  • anonymous
I'd say then calculate surface area for both cases. (Final SA-Initial SA)/Initial SA * 100 should give you the answer
anonymous
  • anonymous
okayyyy.....do you ne shortcut key for this typ of questions.
anonymous
  • anonymous
n yeah definately it will give the ans..thnkyou so mch :)
marigirl
  • marigirl
Let the edge = a cm So increase by 50 % = a + a/ 2 = 3a / 2 TSA of original cube = 6 a 2 TSA of new cube = 6 ( 3a/ 2) 2 = 6 x 9a 2 / 4 = 54a 2 / 4 = 13.5a 2 Increase in area = 13.5a 2 - 6 a 2 = 7.5a 2 Increase % = ( 7.5a 2 / 6 a 2 ) x 100 = 125%
anonymous
  • anonymous
u r genius...thnkyou so mch @marigirl

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