age of a is one third of age of b. after 15year, the age of a will be half of the age of b. find their present age.
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Hi ,
At present
________
age of B = x years
age of A = one third of b's age
= x / 3 years
After 15 years
___________
age of B = ( x + 15 ) years
age of A = ( x/3 + 15 ) years
age of A = half of age of B
x/3 + 15 = ( x + 15 )/2
( x + 45 )/ 3 = ( x + 15 )/ 2
2( x + 45 ) = 3 ( x + 15 )
2x + 90 = 3x + 45
90 - 45 = 3x - 2x
45 = x
x = 45
Therefore,
At present,
age of A = x = 45 years
age of B = x/3
= 45/3
= 15 years
i hope this will useful to you.
****
At present
________
age of B = x years
age of A = one third of b's age
= x / 3 years
After 15 years
___________
age of B = ( x + 15 ) years
age of A = ( x/3 + 15 ) years
age of A = half of age of B
x/3 + 15 = ( x + 15 )/2
( x + 45 )/ 3 = ( x + 15 )/ 2
2( x + 45 ) = 3 ( x + 15 )
2x + 90 = 3x + 45
90 - 45 = 3x - 2x
45 = x
x = 45
Therefore,
At present,
age of A = x = 45 years
age of B = x/3
= 45/3
= 15 years
i hope this will useful to you.
****
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