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The average age of a person and his son is 30 years. The ratio of their age is 4 : 1 respectively. Find the age of son.
- a)12 yr
- b)14 yr
- c)16 yr
- d)24 yr
- e)None of these
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
The average age of a person and his son is 30 years. The ratio of thei...
Let ,father's age=Y years
and,son's age=X years
Acc. to question, there average is 30
therefore,
=>(X+Y)/2=30
=>X+Y=60
=>X+4X=60 (RATIO IS 4:1)
=>5X=60
=>X=12
Therefore correct answer is A
and,son's age=X years
Acc. to question, there average is 30
therefore,
=>(X+Y)/2=30
=>X+Y=60
=>X+4X=60 (RATIO IS 4:1)
=>5X=60
=>X=12
Therefore correct answer is A
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Community Answer
The average age of a person and his son is 30 years. The ratio of thei...
The correct option is A.
Let ,father's age=Y years
and,son's age=X years
Acc. to question, there average is 30
therefore,
=> (X + Y) / 2 = 30
=> X + Y = 60
=> X + 4X = 60 (RATIO IS 4:1)
=> 5X = 60
=> X = 12
Let ,father's age=Y years
and,son's age=X years
Acc. to question, there average is 30
therefore,
=> (X + Y) / 2 = 30
=> X + Y = 60
=> X + 4X = 60 (RATIO IS 4:1)
=> 5X = 60
=> X = 12
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