Step 1: Understanding the data
Investments were purchased for \rupee 2,00,000 and sold for \rupee 1,80,000, resulting in a net cash outflow of \rupee 20,000.
Goodwill was purchased for \rupee 3,00,000, which is a cash outflow.
Step 2: Calculating total cash flow from investing activities
Total cash flow = Outflow from goodwill + Net outflow from investments
= \rupee 3,00,000 + \rupee 20,000 = \rupee 3,20,000.
Thus, the correct answer is \( \mathbf{(B)} \) Outflow \rupee 3,20,000.