Sanchi's age after 15 years will be 4 times her age 6 years back. What is the present age of Sanchi?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 13 years
Let Sanchi’s present age be \(x\) years. Her age after 15 years is \(x+15\) and her age 6 years back was \(x-6\); the question says the first is 4 times the second.
\(x+15=4(x-6)\)
\(x+15=4x-24\)
\(3x=39\)
\(x=13\)