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

• answer=A)98
  because 5*5*5=125 cubes needed and to make it hollow we do not count inner once
  therefore, 125-3*3*3=125-27=98
• 8 years agoHelpfull: Yes(18) No(3)
• overall size of bigger cube is 5*5*5 . If we subtract the 1 from 5 So ( 5-1 ) = 4. To make a hollow cube 5^3 - 4^3 = 61
  So answer is 61
• 8 years agoHelpfull: Yes(4) No(2)
• 25+25+15+15+12+12=104
• 8 years agoHelpfull: Yes(2) No(1)
• ans= 98
  if for 5 it is 5*5*5=125
  then inner cube subtracted i.e of 3*3*3=27
  =======>3=5-1(left)-1(right)
• 8 years agoHelpfull: Yes(1) No(1)