.Leena cut small cubes of 10 cubic cms each. Which she joined to form a cube wit 10 cubes length, 5 cubes in depth and 5 cubes wide. How many more small cubes does she require to form a perfect cube?

• The cube which will be formed would have a volume of 10*10*10=1000
  Cube formed by leena 10*5*5= 250
  Volume of cube still to be formed = 1000-250=750
  No. of cubes required = Volume of cube still to be formed/volume of one cube
  =750/10=75
• 13 years agoHelpfull: Yes(39) No(4)
• small cube = 10 cm cubic
  volume of cuboid = 10*5*5=250 cm cube
  perfect cube can be form of volume = 1000 cm cube (because maximum length =10,
  so,for forming cube V=1000)
  so volume left=1000-250=750 cm cube
  v of small cube = 10 cm cube
  nuber of cube more require =75
• 13 years agoHelpfull: Yes(10) No(1)
• 0.75 ans according to the data given in the question..otherwise question of the data r incorrect
• 13 years agoHelpfull: Yes(2) No(4)
• cube form by leena is 10*5*5 =250 cubes of 10 cublic cm each
  we can made perfect square of 7 cubes of 10cm^3 so we require 7*7*7 = 343
  so leena needs 343-250 =93 cubes of 10cm^3
• 12 years agoHelpfull: Yes(1) No(0)
• Total cubes = 10*5*5 = 250 cubes
  In order to be a perfect cube, 10*10*10 cubes need to be used
  So, 1000-250 = 750 cubes need to be used!
  
• 11 years agoHelpfull: Yes(1) No(0)
• no.of cubes=volume of large cube/volume of small cubes by which they are formed
  =10*5*5/10
  =250
• 13 years agoHelpfull: Yes(0) No(7)
• sorry to sat 1 thing i don't understand side of cube are equal right........
  then how u guys solving this problem as i think data is not clear
• 13 years agoHelpfull: Yes(0) No(1)
• 30 is the answer
• 13 years agoHelpfull: Yes(0) No(8)
• The Q says 1 small cube is of 10 cubic cm. We do not need that data. We have 10*5*5 = 250 cubes in a formed cube by Leena. But A perfect cube can only be of 10*10*10 = 1000 cubes. So more cubes required are 1000-250 = 750.
  
  Rest changes depend on options given.
• 12 years agoHelpfull: Yes(0) No(2)