Question
The ratio of Tim's age to Riordan's age is 3 : 1. Last year, their average age was 17. How old will Riordan be in 9 years' time?
2 m

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The ratio of Tim's age to Riordan's age is 3 : 1. Last year, their average age was 17. How old will Riordan be in 9 years' time?