Explanation

She spent 4/9 of her money, which means she spent (4/9)x rupees.

She has 25 rupees left, which means she has (5/9)x rupees left (since 1 - 4/9 = 5/9).

We know that (5/9)x = 25, so we can solve for x:

x = 25 x (9/5)

x = 45

So, the girl had 45 rupees initially.

She spent (4/9) x 45 = 20 rupees.

The correct answer is: 20