Smita Was Making A Cube With Dimensions 5*5*5 Using 1*1*1 Cubes. What Is The Number Of Cubes Needed To Make A Hollow Cube Looking Of The Same Shape?
A) 98 B) 104 C) 100 D) 61

• Here solution is 98
  bcoz cube use to make perfect 5 * 5 * 5 = 125
  No need of cube to make hollow=(5-2)*(5-2)*(5-2)=27
  so total cube need to make hollow cube is=125-27 =98
• 13 years agoHelpfull: Yes(21) No(0)
• ans is 98 becoz 125-27=98
• 13 years agoHelpfull: Yes(17) No(1)
• Let solve this step by step
  Let say the faces of the bigger hollow cube are A, B, C, D, E and F
  Let us say A is opposite B, C is opposite D and E is opposite F
  Now, A and B have 5*5 cubes each
  C and D would have 3*5 cubes each (not including the already counted cubes for A and B)
  E and F would have 3*3 cubes each (not including the already counted cubes for A, B, C and D)
  So, total cubes required = 2(5*5) + 2(3*5) + 2(3*3) = 98 cubes of 1*1*1 dimension
• 12 years agoHelpfull: Yes(9) No(0)
• ans 104
  25+25+(18*3)=104
• 13 years agoHelpfull: Yes(0) No(32)
• here we have given, 5by5by5 cube (total solid)= 125 but due to we want it hollow so we remove te unwanted ; and we gives 5-1 , 1 is the side of small cube so we take 5-1,5-1,5-1=64 remove that portion we get 125-64=61 exact answer
• 13 years agoHelpfull: Yes(0) No(13)