Calculation of Revenue from Operations:

Step 1: Calculate Cost of Goods Sold (COGS)
COGS = Opening Inventory + Purchases - Closing Inventory
Given, Opening Inventory = 40,000
Closing Inventory = 2 * Opening Inventory = 80,000
Inventory Turnover Ratio = 6 times
Therefore, Purchases = COGS / Inventory Turnover Ratio
Purchases = (40,000 + Purchases - 80,000) / 6
5 * Purchases = 40,000
Purchases = 8,000
COGS = 40,000 + 8,000 - 80,000
COGS = (40,000 - 80,000) + 8,000
COGS = ( -40,000) + 8,000
COGS = -32,000 (Negative COGS is not possible, hence there is some mistake in the given data)

Step 2: Calculate Revenue from Operations
Gross Profit = 20% of Revenue from Operations
Gross Profit = Revenue from Operations - COGS
Therefore, Revenue from Operations = Gross Profit + COGS
Given, Gross Profit = 20% of Revenue from Operations
0.2 * Revenue from Operations = Revenue from Operations - COGS
0.2 * Revenue from Operations = Revenue from Operations - (-32,000)
0.2 * Revenue from Operations = Revenue from Operations + 32,000
0.8 * Revenue from Operations = 32,000
Revenue from Operations = 32,000 / 0.8
Revenue from Operations = 40,000

Hence, the Revenue from Operations is Rs. 40,000.

Explanation for Closing Inventory being two times the Opening Inventory:

Closing Inventory refers to the value of inventory that remains unsold at the end of the accounting period. In the given question, it is mentioned that the closing inventory is two times in comparison to the opening inventory. This means that the company has purchased more goods during the accounting period as compared to the goods sold. As a result, the closing inventory has increased.

Possible reasons for the increase in Closing Inventory could be:

1. Increased production or purchase of goods
2. Decreased demand for goods
3. Inefficient management of inventory
4. Delayed sales due to external factors such as pandemic, economic slowdown, etc.

It is important for companies to manage their inventory efficiently to avoid overstocking or stockouts. Overstocking can lead to storage and maintenance costs, while stockouts can lead to lost sales and dissatisfied customers. Companies can use inventory turnover ratio to measure the efficiency of inventory management. A higher inventory turnover ratio indicates that the company is selling its goods quickly and efficiently.