Algebrahard · Past Paper
The age of the father is twice the sum of the ages of his two children. After 20 years, his age will be equal to the sum of the ages of his children. Find the father's age.
A40 years
B30 years
C50 years
D60 years
✓ Correct Answer: A — 40 years
F=2(c1+c2). After 20 years, F+20 = (c1+20)+(c2+20). F+20 = c1+c2+40. Substitute c1+c2 = F/2: F+20 = F/2 + 40 -> F/2 = 20 -> F=40.
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