Sunny is thrice as old as Ravi. Four years ago his age was four times Ravi's age. The present age of Sunny is:
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Step-by-step explanation:
Let Ravi's present age be x years.
After 15 years, his age will be (x+15) years.
It is given that after 15 years, Ravi's age will be four times his present age.
∴4x=x+15
⇒4x−x=15
⇒3x=15
⇒x=
3
15
=5
Hence, Ravi's present age is 5 years.
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