Q. What will be the least possible number of planks, if the three pieces of timber 42m,49m,63m long have to be divided into planks of same length?

Options
a) 7
b) 8
c) 22
d) None of these

• HCF of 42,49,63 is 7
  so for 42 there will be 42/7=6
  from 49 there will be 49/7=7
  from 63 there will be 63/7=9
  total no of planks 6+7+9=22 ans
• 10 years agoHelpfull: Yes(43) No(0)
• @anitha yes least possible lenght og each plank is 7...question is number of planks divide 42,49,63 by 7 and add total 22 ..
• 10 years agoHelpfull: Yes(4) No(0)
• the possible length of planks that can be cut from three pieces of timber is the HCF of given lengths i.e. 7
  so from first piece 42/7= 6 planks
  and 49/7= 7 planks
  63/7= 9 planks
  so total= 6+9+7= 22
• 10 years agoHelpfull: Yes(1) No(1)
• Ans is 22... 42/7=6
  49/7=7
  63/7=9
  
  6+7+9=22 (ans)
• 9 years agoHelpfull: Yes(1) No(0)
• Ans is 7
  We should have to see the hcf of these numbers 42,49,63
  
• 10 years agoHelpfull: Yes(0) No(1)
• 7
  hcf of 42,49,63
  i.e common is 7
  
• 10 years agoHelpfull: Yes(0) No(2)
• a) 7 (H.C.F of 42,49,63)
• 10 years agoHelpfull: Yes(0) No(1)
• we r going to find no of pieces of planks
  so least possible length of each plank cut from three timber is = hcf(42,49,63)
  and number of planks=(42+49+63)/7=22(ans)
• 9 years agoHelpfull: Yes(0) No(0)
• 7 is the right ans. because hcf of 42,49,63i=7
• 9 years agoHelpfull: Yes(0) No(1)
• 7 is the right ans. because hcf of 42,49,63i=7
• 9 years agoHelpfull: Yes(0) No(1)
• HCF(42,49,63)=7
  least length vl be 7...
  no of pranks will be 42/7=6
  49/7=7
  63/7=9
  so in total it vl be= 6+7+9=22
• 9 years agoHelpfull: Yes(0) No(0)
• HCF of 42,49,63 is 7.
  (We find HCF because logs are equal sizes and we have to find the least possible number of planks.)
  Number of planks=(42/7)+(49/7)+(63/7)=22
  
• 8 years agoHelpfull: Yes(0) No(0)
• Take HCF of 42,49, and 63, it will comes 7. All the pieces must be of size 7m. So total no of pieces =22
• 8 years agoHelpfull: Yes(0) No(0)
• 22
  take HCF of these pieces that is 7 and
  divide all pieces by 7 and sum all
  42/7+49/7+63/7=22
• 6 years agoHelpfull: Yes(0) No(0)
• Ans is 22
  Hcf=7
  So,
  42/7=6
  49/7=7
  63/7=9
  
  6+7+9=22
• 1 year agoHelpfull: Yes(0) No(0)
• a)7
  HCF of 42,49,63 is 7
• 1 year agoHelpfull: Yes(0) No(0)