The twice of sum of the ages of a father and his son is 8 times the age of the son. If the average age of the father and the son is 30 years, what is father's age ?
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Answer:
Age of father = 45 years
Step-by-step explanation:
Average age of father and son= (F+S)/2=30; F+S=60 -----1
2(F+S)=8S
2x60=8S (from 1 F+S=60)
S=2x60/8
S=15 ------------2
from 1 & 2
F+S=60
F+15=60
F=60-15
F=45
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