A woman has 20406 yards of cloth on a single roll, and she wants to divide it into 20406 lengths of 1 yard each. It takes her 6 seconds to cut each length. Working non-stop, how long (in seconds) will it take her to cut all 20406 pieces?

• 20405*6(because there will already be piece
  
• 9 years agoHelpfull: Yes(22) No(3)
• for 20406 yard length we apply 20405 cuts only
• 9 years agoHelpfull: Yes(6) No(1)
• for each length to cut the cloth it takes=6sec.
  but we need these cloth into 20406 pieces of equal length so 20406*6=122436
• 9 years agoHelpfull: Yes(3) No(10)
• for these type of question take a smaller number i.e 5
  if 5 yard of cloth needed to cut in 5 pieces then
  no. of cuts will be
  5-1=4 (or u can draw n check)
  4*time taken
  so
  no of cut in question be
  20405
  and time taken 20405*6
• 8 years agoHelpfull: Yes(2) No(0)
• Sum of even num=2n(n+1)(2n+1)/3
  n=10
  so ans is 1540
• 9 years agoHelpfull: Yes(1) No(7)
• One cut makes two pieces.. so no of cuts=no of pieces-1..so 20405*6 is the answer..
• 8 years agoHelpfull: Yes(0) No(0)