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The ratio between Binov?s and Alisha?s present ages is 5 : 6 respectively. Three years hence the ratio between their ages will he 6 : 7 respectively. What was Alisha?s age eight years ago ??
- A7 years
- B10 years
- C26 years
- D18 years
Answer not set
Discussion 1
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CCommunity
Solution
Let the present age be A and B respectively.
So,
B:A= 5:6 or 5A=6B -(eq1)
3 year hence,
B+3:A+3= 6:7
7B+3=6A (eq2)
Solving eq1 and eq2 we get A=18,
So A's age 8 years ago=10years
Let the present age be A and B respectively.
So,
B:A= 5:6 or 5A=6B -(eq1)
3 year hence,
B+3:A+3= 6:7
7B+3=6A (eq2)
Solving eq1 and eq2 we get A=18,
So A's age 8 years ago=10years