A girl is twice as old as her sister. Five years hence, the product of their ages ( in years) will be 375. Find their present ages.
Answers
Answered by
12
Let "x" be the age of sister
"2x" be the age of girl
Five years hence,
age of sister = x + 5
Age of girl = 2x + 5
Product of their ages = 375
(x + 5)(2x + 5 ) = 375
2x2 + 5x + 10x + 25 - 375 = 0
2x2 + 15x - 350 = 0
2x2 - 20x + 35x - 350 = 0
2x(x - 10) + 35(x -10) = 0
(2x + 35)(x - 10) = 0
x = 10
Hence the age of sister is 10 years, age of girl = 2(10) = 20 years.
HOPE THIS ANSWER HELPS YOU
Answered by
2
The answer is :
The girl is 20 years old while her sister is 10years.... now
The girl is 20 years old while her sister is 10years.... now
Attachments:
Similar questions