12towns are divided into 4group of 3 in each. If any two towns in same group are connected by 3 direct lines and by different group by 1 direct line. Find the total no of direct line?

• 81 direct lines
• 11 years agoHelpfull: Yes(12) No(10)
• 90 direct lines
• 10 years agoHelpfull: Yes(10) No(2)
• 90 direct lines
• 10 years agoHelpfull: Yes(7) No(1)
• Ans_ 48
  direct lines in same group is 36
  ie.
  in 1group having 3 towns each town having 3 dirc conn then tot lines in 1 group is 9.
  for 4 group=36
  for diff line it is 3 for each group tot is 12.
  36+12=48 lines.
• 11 years agoHelpfull: Yes(6) No(5)
• Ans_ 57
  direct lines in same group is 36
  ie.
  in 1group having 3 towns each town having 3 dirc conn then tot lines in 1 group is 9.
  for 4 group 36 and
  there are 3 towns in each group,there are 4 such towns.
  1st group can make 3*4=12 direct lines,2nd group can make 3*2=6 direct lines,3rd group can form 3*1=3 direct lines.
  total no.of lines =36+12+6+3=57.
• 10 years agoHelpfull: Yes(2) No(1)
• there will be 9 direct lines.
  3*3.
• 11 years agoHelpfull: Yes(1) No(4)
• any one explain the question please
• 11 years agoHelpfull: Yes(1) No(1)
• 15 direct line
• 10 years agoHelpfull: Yes(1) No(0)
• 18 direct lines
• 10 years agoHelpfull: Yes(1) No(0)
• Direct lines per same group is (3*3)*4=36
  
  Direct lines per different group is(1- 2,3,4)27lines+(2- 3,4)18lines+(3-4)9lines=54
  
  so total 90
• 10 years agoHelpfull: Yes(1) No(1)
• G1 , G2 , G3 , G4 be 4 groups
  
  G1= t1,t2,t3
  
  G2=t4,t5,t6
  
  G3=t7,t8,t9
  
  G4=t10,t11,t12 are the towns in each groups
  
  t1,t2,t3=9 ; t4,t5,t6=9 ; t7,t8,t9=9 ; t10,t11,t12=9 (9+9+9+9=36 direct lines same group)
  
  9+9+9+9+9+9+9+9+9=81 (direct lines in different group)
  
  81+36=117 direct lines
• 10 years agoHelpfull: Yes(0) No(3)
• question nahin samjh aaya bhai log....
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• 3*36+16*3=156 ans
• 9 years agoHelpfull: Yes(0) No(0)
• (a1,b1,c1)(a2,b2,c2).....4 groups.
  a1 ,b1,c1 connected using 9 direct lines---total 9*4=36
  a1 to a2,b2...remaining ----9 lines i.e each one--so total 9*12=108
  ans=108+36=144
• 9 years agoHelpfull: Yes(0) No(0)