The total ages of three persons a, b, c is 90yrs, 10 yrs before ratio of a, b, c ages is 1:2:3.What is c’s age?
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ten year ago total age is 60 year
than x+2x+3x=60
than x=10
10 year ago a is 10 year old than now he is 20year old
than x+2x+3x=60
than x=10
10 year ago a is 10 year old than now he is 20year old
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