Question
Oliver has a mass of 7f kg. Fabian is 5 kg heavier than Oliver. The mass of Kathy is twice the total mass of Oliver and Fabian.
  1. Find the total mass of the 3 children in terms of f.
  2. If f = 2, find the average mass of the 3 children.
2 m
(a)

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(b)

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Oliver has a mass of 7f kg. Fabian is 5 kg heavier than Oliver. The mass of Kathy is twice the total mass of Oliver and Fabian.
  1. Find the total mass of the 3 children in terms of f.
  2. If f = 2, find the average mass of the 3 children.