Ten years ago the ratio between the ages of Mohan and Suman was 3:5. 11 years hence it will be 11:16. What is the present age of Mohan?
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let 10yrs ago age of mohan=3x, suman=5x
let 11yrs ago age of mohan=11y,suman=16y
so 3x+10=11y-11
3x-11y=-21 (1)
5x+10=16y-11
5x-16y=-21 (2)
(1)×5 &(2)×5 ------
y=6,
mohan's age= 11yafter 11yrs
mohon's present age=66-11=55
let 11yrs ago age of mohan=11y,suman=16y
so 3x+10=11y-11
3x-11y=-21 (1)
5x+10=16y-11
5x-16y=-21 (2)
(1)×5 &(2)×5 ------
y=6,
mohan's age= 11yafter 11yrs
mohon's present age=66-11=55
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