24. A 31" x 31" square metal plate needs to be fixed by a carpenter on to a wooden board. The carpenter uses nails all along the edges of the square such that there are 32 nails on each side of the square. Each nail is at the same distance from the neighbouring nails. How many nails does the carpenter use?

• 124 nails.. since he will b placing nails aa over equally(32 *4= 128) but 4 nails at the corners will b common for 2 consecutive sides each.
  this gives 128-4 =124
• 12 years agoHelpfull: Yes(41) No(3)
• the carpenter uses 124 nails. as the nails on corners are common to two sides.
  thus 32*4-(1+1+1+1) {as we have to subtract each nail from the corner hich is considered twice in calculation)
  thus 128-4=124
• 12 years agoHelpfull: Yes(10) No(2)
• 32+32+30+30= 124 nails
• 12 years agoHelpfull: Yes(7) No(2)
• 32*4-4*1=124
• 12 years agoHelpfull: Yes(7) No(0)
• 30 on each side and 4 at corners
  so ans is (30*4)+4=124
• 12 years agoHelpfull: Yes(5) No(0)
• 128-4=124 nails are used by carpenter.
  
• 12 years agoHelpfull: Yes(3) No(0)