5 years hence a mother's age will be 3 times that of her daughter's age and 5 years ago her mum's age was 7 times as old as herself . Find their present ages
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Step-by-step explanation:
5yrs before=7:1=6
after5yrs. =3:1=2
new ratio by cross multiply
5yrbefore=14:2
5yrsafter=18:6
4R increase due to 10yrs increase
so 4R=10yrs
1R=2.5yrs
mother's 18R=18×2.5=45yrs
present age=45-5=40yrs
daughters 6R=6×2.5=15yrs
present age=15-5=10yrs.
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