a Girl made a block with small cubes of 8 cubic cm volume to make a block , 3 small cubes long, 9 small cubes wide and 5 small cubes deep. the she realises she used more cubes than she needed.if it were made hollow then minimum number of cubes she needs is:

• The total volume (in terms of number of cubes) of the solid = 3*9*5 = 135
  The total volume (in terms of number of cubes) of the hollow = (3-2)*(9-2)*(5-2)
  = 21
  so number of cubes required = 135-21 = 114
  
• 12 years agoHelpfull: Yes(14) No(1)
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• 12 years agoHelpfull: Yes(2) No(16)