three years ago a man was 8 times as old as his son and the sum of ages at present is 51 years ,how old is the sun now ?
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The sun is one of the oldest structures present before us
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let son present age be x
let man present age be y
Three years ago
son's age is x-3
man's age is y-3
since the man was 8 times as older than his son three years ago,
8(x-3)=y-3
8x-24=y-3
8x-y=21 (eqn 1)
since the sum of their present age is 51
x+y=51 (eqn 2)
equating 1 and 2,we get
x=8
Therefore son's present age is 8.
let man present age be y
Three years ago
son's age is x-3
man's age is y-3
since the man was 8 times as older than his son three years ago,
8(x-3)=y-3
8x-24=y-3
8x-y=21 (eqn 1)
since the sum of their present age is 51
x+y=51 (eqn 2)
equating 1 and 2,we get
x=8
Therefore son's present age is 8.
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