Rahul's age after 15 years will be 5 times his age 5 years back, What is the present age of Rahul?
Answer: B
Let Rahul's present age is \(x\) years.
Then \(x+15=5(x-5)\)
\(\Rightarrow\) \(4x=40\)
\(\Rightarrow\) \(x=10\)