Rahul is elder than Rohit by 9 years. If their present ages are in the ratio 5:7, what is the age of Rahul?
Let the present ages of Rohit and Rahul's be x and x+9 respectively. (x+9)/x=7/5,5x+45=7x,2x=45,x=22.5,Rahul's age=22.5+9=31.5
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