Question 1003589
 Isha is 5 years younger than her brother.
i = b - 5 
 After 4 years their ages will be in ratio 2:3.
{{{((i+4))/((b+4))}}} = {{{2/3}}}
replace i with (b-5)
{{{((b-5)+4)/((b+4))}}} = {{{2/3}}}
{{{((b-1))/((b+4))}}} = {{{2/3}}}
cross multiply
3(b-1) = 2(b+4)
3b - 3 = 2b + 8
3b - 2b = 8 + 3
b = 11 is the brother's age
then
i = 11 - 5
i =  6 yrs is I's age
 
:
Add 4 to each age and check to see the ratio
{{{10/15}}} = {{{2/3}}}

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