Question
Nick has a mass of 6a kg. John is 4 kg heavier than Nick. The mass of Gillian is twice the total mass of Nick and John.
  1. Find the total mass of the 3 children in terms of a.
  2. If a = 3, find the average mass of the 3 children.
2 m
(a)

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(b)

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Nick has a mass of 6a kg. John is 4 kg heavier than Nick. The mass of Gillian is twice the total mass of Nick and John.
  1. Find the total mass of the 3 children in terms of a.
  2. If a = 3, find the average mass of the 3 children.