A man spent 60% of his salary on household expenses, 20% of his salary on rent and out of remaining salary, he donated 80% to a trust. If he is left with ₹20,000, then what is his salary?

Let the salary be ₹x.

Household expenses = 60% ⇒ remaining = 40% of x
Rent = 20% ⇒ remaining after rent = $40% - 20% = 20%$ of x

So remaining salary = 20% of x = $0.2x$

He donates 80% of this remaining amount, so he keeps 20% of it.

Final amount left = 20% of $0.2x$ = $0.2 \times 0.2x = 0.04x$

Given final amount = ₹20,000

So, $0.04x = 20000$
$x = 20000 / 0.04 = 5,00,000$

Final Answer / अंतिम उत्तर: ✅ ₹5,00,000