1. The present ages of Trisha and Shalini are in the ratio of 7: 6 respectively . After 8 years the ratio of their ages will be 9 : 8. What is the difference in their ages ?
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By: anil on 05 May 2019 01.38 am
Let present ages of Trisha and Shalini be $$7x$$ and $$6x$$ years respectively. Acc. to ques, ratio of their ages after 8 years => $$frac{7x + 8}{6x + 8} = frac{9}{8}$$ => $$56x + 64 = 54x + 72$$ => $$56x - 54x = 72 - 64$$ => $$2x = 8$$ => $$x = frac{8}{2} = 4$$ $$ herefore$$ Difference in their ages = $$7x - 6x = x$$ = 4 years
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