There are 150 weights .Some are 1 kg weights and some are 2 kg weights. The sum of the weights is 260.What is the number of 1kg weights?

• x+y=150......(1)(let assume x=1kg and y=2kg)
  x+2y=260.....(2)(combination of 1kg and 2kg)
  by solving 1 & 2
  x=40 and y=110
  so num of 1kg=40
  
• 12 years agoHelpfull: Yes(24) No(0)
• 40 weights are 1kg weights.
  Explanation:
  40*1kg weight = 40
  110*2kg weight = 220
  so number of weights = 40 + 110 = 150.
  and total weight = 40 + 220 = 260kg.
• 12 years agoHelpfull: Yes(3) No(4)
• 1x+2y=260
  x+y=150
  =>y=110;
  x=40;
  so total no. of 1kg weights are 40
• 12 years agoHelpfull: Yes(1) No(1)
• ans:40
  let m be the no. of 1kg wt
  let n be the no. of 2 kg. wt
  given (m*1)+(n*2)=260
  also n+m=150
  frm the abv two equations we get m=40
  therefore,no. of 1 kg. weigts=40
• 12 years agoHelpfull: Yes(1) No(0)
• x1+x2=150
  x1+2x2=260
  so
  
  x2=110
  x1=40
  number of 1kg weight is 40 and
  number of 2kg weight is 110.
• 12 years agoHelpfull: Yes(0) No(0)
• Let x be the 1kg weights, and 150-x be the 2 kg weights
  1(x)+2(150-x)=260
  -x=-40
  x=40
• 11 years agoHelpfull: Yes(0) No(0)