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anonymous

  • one year ago

A cube is cut into smaller cubes such that each edge if cube is increased by 50% ,find the % increase in surface area?

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  1. anonymous
    • one year ago
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    (A) 200% (B) 100% (C) 125% options

  2. marigirl
    • one year ago
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    each edge OF cube is increased by 50%?

  3. anonymous
    • one year ago
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    yup dr

  4. anonymous
    • one year ago
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    well, then increase of 50% means that new edge is 1.5 times the older one.

  5. anonymous
    • one year ago
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    how u get that @decidedlypretentious

  6. anonymous
    • one year ago
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    \[x + 50/100 x = 150/100x\]

  7. anonymous
    • one year ago
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    btw, have a lookie at your question again, does it say decreased or increased? cause if its cut into smaller cubes... ehh

  8. anonymous
    • one year ago
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    question is lyk dat only

  9. anonymous
    • one year ago
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    Assuming the question doesn't mean the first bit.

  10. anonymous
    • one year ago
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    I'd say then calculate surface area for both cases. (Final SA-Initial SA)/Initial SA * 100 should give you the answer

  11. anonymous
    • one year ago
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    okayyyy.....do you ne shortcut key for this typ of questions.

  12. anonymous
    • one year ago
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    n yeah definately it will give the ans..thnkyou so mch :)

  13. marigirl
    • one year ago
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    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%

  14. anonymous
    • one year ago
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    u r genius...thnkyou so mch @marigirl

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