A boy want to make a cuboid of dimension 5m,6m,7m from small cubes of .03 m3.later
he realized ,he can make same cuboid by making it hollow. Then it take some cubes less.
What is the no of these cube.

• its answer is 5000.
  5*6*7=.03*x, x=7000
  3*4*5=.03*x, x=2000
  so we haveto remove (7000-2000)=5000
  this is absolutely correct.
  
  
• 12 years agoHelpfull: Yes(15) No(6)
• 5*6*7*-3*4*5=210-60=150
  150/0.03=15000/3=5000
• 12 years agoHelpfull: Yes(8) No(3)
• small cubes dimension = 0.03 m^3 ------> 3/100 m^3
  Total no of cubes needed to make a new cube = 5*6*7/(3/100) ---> 7000
  No of cubes to be removed --------->(5-2)(6-2)(7-2)/(3/100)----->2000
  so the answer is --->2000
• 12 years agoHelpfull: Yes(7) No(7)
• the volume of cuboid is 5 * 6 * 7 = 210
  now consider length = 5m , width = 6m and height = 7m.... in order to make hollow boy has to cut one slot in such a way that boundries are sealed but the inner material is void i.e hollow... So 210 - (6 * 7) + (6 + 6) = 180... so it takes 30 cubes less....
• 12 years agoHelpfull: Yes(0) No(11)
• the volume of cuboid is 5 * 6 * 7 = 210
  now consider length = 5m , width = 6m and height = 7m.... in order to make the cube hollow, boy has to cut one slot in such a way that boundries are sealed but the inner material is void i.e hollow... So 210 - (6 * 7) + (6 + 6) = 180... so it takes 30 cubes less....
• 12 years agoHelpfull: Yes(0) No(5)
• 5000 is the answerrrrrrrr
• 12 years agoHelpfull: Yes(0) No(1)