Present ages of 'X' and Y' are in the ratio 5 : 6 respectively. Seven years hence
this ratio will become 6: 7 respectively. What is 'X's present age in year?
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Answered by
21
Let present age be a
Then,
Present age of X= 5a
Present age of Y= 6a
After 7 year,
Age of X= 5a+7
Age of Y= 6a+7
Ratio given is,
- 5a+7 : 6a+7 = 6:7
- 5a+7 / 6a+7 = 6/7
- 35a+49=36a+42
- 49-42=36a-35a
- a=7
Present age of X = 5a= 5x7 =35
Present age of Y = 6a= 6x7 =42
After 7 years,
Age of X= 35+7=42
Age of Y= 42+7=49
Answered by
7
Answer:
Let present age be a
Then,
Present age of X= 5a
Present age of Y= 6a
After 7 year,
Age of X= 5a+7
Age of Y= 6a+7
Ratio given is,
5a+7 : 6a+7 = 6:7
5a+7 / 6a+7 = 6/7
35a+49=36a+42
49-42=36a-35a
a=7
Present age of X = 5a= 5x7 =35
Present age of Y = 6a= 6x7 =42
After 7 years,
Age of X= 35+7=42
Age of Y= 42+7=49
Step-by-step explanation:
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