Question
The total mass of David and Gabriel is 162 kg. The total mass of Japheth and Gabriel is 121 kg.
  1. How much heavier is David than Japheth?
  2. If the total mass of the 3 boys is 239 kg, how heavy is Gabriel?
4 m
(a)

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(b)

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The total mass of David and Gabriel is 162 kg. The total mass of Japheth and Gabriel is 121 kg.
  1. How much heavier is David than Japheth?
  2. If the total mass of the 3 boys is 239 kg, how heavy is Gabriel?