If 1½ years is added to 3/7th of the age of Ravi, it will be half of his present age. What is his present age?14 years21 years28 yearsNone of these
Question
If 1½ years is added to 3/7th of the age of Ravi, it will be half of his present age. What is his present age?
- 14 years
- 21 years
- 28 years
- None of these
Solution
Let's denote Ravi's present age as X.
According to the problem, 1½ years added to 3/7th of Ravi's age equals half of his present age. We can write this as an equation:
3/7X + 1.5 = 1/2X
To solve for X, we first need to get rid of the fractions. Multiply every term by 14 to do this:
6X + 21 = 7X
Subtract 6X from both sides:
21 = X
So, Ravi's present age is 21 years.
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