Net working capital = Current assets - Current liabilities
$Rs. 30000$ = Current assets - Current liabilities
Therefore, Current assets = Current liabilities + $Rs. 30000$
Current ratio = Current assets/ Current liabilities
$2.5$ = [Current liabilities + $Rs. 30000$] / Current liabilities
$2.5$ Current liabilities = Current liabilities + $Rs. 30000$
Current liabilities = $Rs. 30000/ 1.5$
Therefore, Current liabilities = $Rs. 20000$
Now,
Current assets = Current liabilities + $Rs. 30000$
= $Rs.20000 + Rs. 30000$
=$Rs. 50000$
Now, Quick Ratio = Quick Assets/ Current liabilities
$1.5$ = Quick Assets/ $20000$
Therefore,
Quick Assets = $Rs. 30000$
Quick Ratio = Quick Assets/ Current liabilities
Quick Ratio = [Current Assets - Stock ]/ Current liabilities
$1.5$ = [$50000$ - Stock] / $20000$
Stock = $50000 - 30000$
= $Rs. 20000$