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anonymous

  • one year ago

If the cost of painting 1 sq m is Rs.50, then what will be the maximum amount of saved in painting the room in the most economical way, if the sum of the length , breadth and height is 21 and all sides are integers? (floor is not painted ). 1 ) 10850 2) 8400 3) 9650 4) 8540

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  1. anonymous
    • one year ago
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    What's your guess?

  2. anonymous
    • one year ago
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    No clue.

  3. hartnn
    • one year ago
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    for the saved amount to be maximum, lets consider the volume to be maximum. Volume will be max when the room is cube-shaped. length = height = breadth = 7 (since their sum= 21) now try to calculate area of the faces, excluding floor

  4. anonymous
    • one year ago
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    Should't volume be the minimum to save the maximum ?

  5. anonymous
    • one year ago
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    And if I calculate like the way you suggested, the answer comes out to be Rs.12250

  6. hartnn
    • one year ago
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    how are we calculating saved amount here?

  7. anonymous
    • one year ago
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    No clue :/

  8. hartnn
    • one year ago
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    seems to be an incomplete question. to find how much we saved, we need to find how much we spent before...

  9. hartnn
    • one year ago
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    saved amt = amt spent before - amount spent now, when sum = 21

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