After 15 years, Mary's age will be four times of her present age. Find her present age.
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After 15 years, Mary's age will be four times of her present age. Find her present age.
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Answer:
Let present age of Mary =m
After 25years, mary's age =4m
4m=m+15
3m=15
m=5
∴ Present age of mary is 5 years.
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