Q: Pervez, Sunny, and Ashu's spending ratios are 16: 12: 9 and their savings are 20%, 25%, and 40% of their income, respectively. Find Sunny's salary based on the total income of Rs 1530.  

Let X be the total income of Pervez, Sunny, and Ashu.
Then, Pervez's salary is X * 16/37.
Sunny's salary is X * 12/37.
Ashu's salary is X * 9/37.

We are given that Pervez's saving is 20% of his income, Sunny's saving is 25% of his income, and Ashu's saving is 40% of his income, so we can set up the following equations:
X * 16/37 * 20/100 = X * 16/37 * 1/5 = X * 16/185 = X * 16/185 * 100/100 = X * 16/185 * 1
X * 12/37 * 25/100 = X * 12/37 * 1/4 = X * 12/148 = X * 12/148 * 100/100 = X * 12/148 * 1
X * 9/37 * 40/100 = X * 9/37 * 2/5 = X * 9/74 = X * 9/74 * 100/100 = X * 9/74 * 1

Adding these equations gives us:
X = 1530.

Substituting this value back into the equation for Sunny's salary, we find that Sunny's salary is 1530 * 12/37 = 480.

Therefore, Sunny's salary is 480.