Mother, daughter and infant total weight is 74 kg. Mother's weight is 46 kg more than daughter and infant's weight. Infant's weight is 60% less than daughter's weight. Find daughter's weight.

• 10 years
  
  
  
  
• 10 years agoHelpfull: Yes(28) No(6)
• Total Age is M+D+I=74
  given that M-D-I=46
  solving above 2 eq's we get Mother age = 60
  now remaing age=14 which is sum of daughter and Infant age.
  Given that Infant age is 60% lass than Daughter.
  i.e If daughter age is 100 then infant age is 40.
  So ages ratio Of D and I is 100 : 40 i.e ... 5 : 2
  So (5+2)=7 parts equal to 14.
  then 5 parts equal to 10.
  2 parts equal to 4.
  daughter age is =10
  and infant age is = 4.
• 10 years agoHelpfull: Yes(10) No(3)
• Daughters age is 10 years
  M+D+I = 74 (Given)
  
  M= (D+I)+46
  
  so 2(D+I)=74-46
  =28
  therefore D+I = 14
  and given that
  
  I= d*40/100;
  means i=2/5d
  so adding 7d/5=13
  therefore d=10
  and infant is 4 years
  and mom is 60 years old
• 10 years agoHelpfull: Yes(8) No(0)
• ten is the corect ans
  
• 10 years agoHelpfull: Yes(4) No(2)
• m+d+i=74
  d+i+46=m
  2(d+i)=28
  d+i=14
  i=d-((60100)d)
  d=10, i=4
• 9 years agoHelpfull: Yes(4) No(0)
• Ans 10 kg
  
  M=46+D+I
  M=+D+I=74
  46+2(D+I)=74
  D+I=14
  D+0.4=14
  d=14/0.4
  d=10
  Hence Proved
• 8 years agoHelpfull: Yes(2) No(5)
• 10kg=(y+7y/5+46+2y/5)
• 10 years agoHelpfull: Yes(1) No(0)
• mother=60 daughter=10 infant=4
• 9 years agoHelpfull: Yes(1) No(1)
• Mother + Daughter + infant =74-------1
  Mother=Daughter + infant+46---------2
  infant = 0.4 Daughter--------------------3
  substitute 2 & 3 in 1
  (Daughter+infant+46)+daughter +(0.4 Daughter)=74
  Daughter+0.4 Daughter+46+Daughter+0.4 Daughter=74
  2.8 Daughter=74-46
  Daughter= 28/2.8=10
  so that Daughter Weight= 10 k.g
• 6 years agoHelpfull: Yes(1) No(0)
• can u plz explain.........mr aman
  
• 10 years agoHelpfull: Yes(0) No(0)
• 10
  m+D+I=74
  M-D-I=46
  I=2/5 D
  on solving this we can get D=10
• 6 years agoHelpfull: Yes(0) No(1)
• 10 kg daughter 4 kg infant and 60 kg mother
• 6 years agoHelpfull: Yes(0) No(0)
• m+d+i=74------------------1
  m=46+d+i-----------------2
  i=d-0.6d(since infant's weight iss 60% less than daughter's)
  so, i=0.4d
  m=46+d+0.4d (from 2)
  from 1 and 2
  46+d+0.4d+d+0.4d=74-----------------3
  Solving 3 we get d= 10
  daughter's weight is 10 kg
• 5 years agoHelpfull: Yes(0) No(0)
• If daughter's weight is x kg, solve for,
  {46+x+(2x/5)}+x+(2x/5)=74.
  
  Thus, x=10kg.
• 4 years agoHelpfull: Yes(0) No(0)