A, B, C and D go for a picnic. When A stands on a weighing machine, B also climbs on, and the weight shown was 132 kg. When B stands, C also climbs on, and the machine shows 130 kg. Similarly the weight of C and D is found as 102 kg and that of B and D is 116 kg. What is D's weight??

• B+C= 130............(1)
  
  B+D = 116 ........ (2)
  C+D = 102 ..........(3)
  Adding (2) and (3), we get
  B+C+2D= 218
  2D= (218)-(B+C) = 218-130 = 88
  D= 44 kg
• 12 years agoHelpfull: Yes(15) No(0)
• B+C+C+D+B+D=130+102+116
  2D=348-2x130
  D=44
• 12 years agoHelpfull: Yes(11) No(1)
• 44 kg...a+b=132..b+c=130..c+d=102...b+d=116...then b+c-(c+d)=130-102=28..hence
  b-d=28 and we have b+d=116...hence d=44kg...
• 12 years agoHelpfull: Yes(3) No(1)
• 44is d ans
  
• 12 years agoHelpfull: Yes(2) No(1)
• a+b=132
  b+c=130
  c+d=102
  b+d=116
  b-d=28
  ans d=44
• 12 years agoHelpfull: Yes(2) No(1)
• A+B=132-->[1]
  B+C=130-->[2]
  C+D=102-->[3]
  B+D=116-->[4]
  solving eqn [2] and [4],we get:
  C-D=14
  now solving this eqn and eqn [3], we get :
  D=44kg
• 8 years agoHelpfull: Yes(0) No(0)