Riya is twice as old as priya now. Three years ago she was thrice as old as priya.How old is riya now?
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Answer:12yrs
Step-by-step explanation:
let Riya's present age be r and Priya's present age be p
at present :
r=2p
3 years ago:
r-3=3(p-3)
substituting the value of p in terms of r from equation 1 in 2
r-3=3(r/2-3)
r-3=3r/2-9
6=r/2
r=12
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