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?

Ans : 40
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Answered by: Suman

  • Jan 24th, 2007


There are a total of 150 weights. Let the number of 1 Kg weights be 'x'. Then the number of 2 Kg weights is '150 - x'. The sum of the weights is 260 Kg. ie [x * 1 + (150 - x) * 2] = 260. By solving this you will get 'x' as 40.

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sultan

  • Aug 18th, 2006
 

Question incomplete here. There are a total of 150 wts. The answer will be 40 numbers of 1kg wts.

latha

  • Sep 16th, 2006
 

how did u get the ans

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Suman

  • Jan 24th, 2007
 

There are a total of 150 weights. Let the number of 1 Kg weights be 'x'. Then the number of 2 Kg weights is '150 - x'. The sum of the weights is 260 Kg. ie [x * 1 + (150 - x) * 2] = 260. By solving this you will get 'x' as 40.

Well this ans is absolutely fine...
but i just want to make a slight change
i.e.
There are a total of 150 weights.
Let the number of 1 Kg weights be 'x'. Then the number of 2 Kg weights is '150 - x'.
The sum of the weights is 260 Kg.
ie [x * 1 + (150 - x) * 2] = 260
      x + 300 - 2x = 260
       -x + 300 = 260
          300 - 260 = x
            40 = x

Hence the ans is 40.

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