Susan made a block with small cubes of 5 cubic cm volume to make a block 7 small cubes
long, 7 small cubes wide and 6 small cubes deep. She realise that she has used more small
cubes than she really needed. She realised that she could have glued a fewer number of
cubes together ot look like a block with same dimensions, if it were made hollow. What is the
minimum number of cubes that she needs to make the block?
114.00
194.00
294.00
100.00

• INITIAL DEMENTION 7*7*6=294;
  NOW 5*5*4=100; THESE CUBES ARE INTERNAL CUBES AND THESE SHOULD BE REMOVED FROM THE TOTAL NO OF CUBES WE WILL GET OUTER SURFACE CUBES.
  HENCE 294-100=194;
• 13 years agoHelpfull: Yes(5) No(1)
• 194 should be divided by 5^3
• 13 years agoHelpfull: Yes(0) No(1)