Leena cut small cubes of 3 cubic cm each. She joined it to make a cuboid of length 10 cm, width 3 cm and depth 3 cm. How many more cubes oes she need to make a perfect cube?

• ans:910/3
  
  vol. of cuboid = 10*3*3=90
  vol. of cube = 10*10*10=1000
  vol of cube - vol. of cuboid = 1000-90 = 910
  cube neened = 910/3
• 12 years agoHelpfull: Yes(29) No(5)
• volume of cube=10*3*3=90cm3
  vol of small cube=3cm3
  no of small cubes req=90/3=30
• 13 years agoHelpfull: Yes(8) No(34)
• vol of cuboid =10*3*3=90cm3
  vol of small cubes=3cm3
  no. of small cubes required =90/3=30
• 13 years agoHelpfull: Yes(3) No(16)
• volume of cube=10*3*3=90cm3
  vol of small cube=3cm3
  no of small cubes req=90/3=30
• 13 years agoHelpfull: Yes(3) No(18)
• volume of small cube=3 cm^3.
  volume of cuboid =10*3*3=90 cm^3.
  now cuboid will change from cuboid to perfect cube of 10*10*10 dimensions.
  so volume needed to make perfect cube=(10*10*10)-90=910 cm^3.
  but our cubes are of 3 cm^3,
  so total no. of cubes required =910/3=303=300(approx.)
  options are incorrect.
• 9 years agoHelpfull: Yes(3) No(1)
• volume of cuboid=10*3*3=90cubic cm
  volume of cubes=3cubic cm
  no o cubes required=90/3=30
• 13 years agoHelpfull: Yes(2) No(17)