Question
The total mass of Paul and Billy is 175 kg. The total mass of Sam and Billy is 129 kg.
  1. How much heavier is Paul than Sam?
  2. If the total mass of the 3 boys is 243 kg, how heavy is Billy?
4 m
(a)

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(b)

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The total mass of Paul and Billy is 175 kg. The total mass of Sam and Billy is 129 kg.
  1. How much heavier is Paul than Sam?
  2. If the total mass of the 3 boys is 243 kg, how heavy is Billy?