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Published on: 05/09/2019
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1.
How are the total revenue of a firm, market price, and the quantity sold by the firm related to each other?
2.
Comment on the shape of the MR curve in case the TR curve is a
(i) positively sloped straight line,
(ii) horizontal straight line.
3.
Whatwouldbetheshapeofthe demand curve so that the total revenue curve is
(a) A positively sloped straight line passing through the origin?
(b) A horizontal line?
4.
Compute the total revenue, marginal revenue and average revenue schedules in following table. Market price of each unit of goods is Rs 10.
| Quantity sold | 0 | 1 | 2 | 3 | 4 | 5 | 6 |
| TR(Rs) | |||||||
| AR(Rs) | |||||||
| MR(Rs) |
5.
From the schedule provided below calculate the total revenue, demand curve and the price elasticity of demand:
| Quantity | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| Marginal Revenue | 10 | 6 | 2 | 2 | 2 | 0 | 0 | 0 | -5 |
1.
( )
Total Revenue = Market Price x Quantity sold
2.
(i) When TR curve is positively sloped straight line, MR is a horizontal line. MR coincides with the demand curve. Price or AR is constant at each level of output.

When AR is constant, MR is also constant.
(ii) When TR is a horizontal straight line, MR is zero. It is because horizontal TR means when price falls, quantity demanded rises in the same proportion. Thus, MR is zero. MR curve coincides with the x-axis.

3.
(a) When TR curve is a positively sloping straight line passing through the origin, demand curve (or price line) will be horizontal. It is shown in the shown in the reason is that demand curve is also the price line. When TR is a straight positively sloped line, price at each level of output is constant.

(b) When TR is a horizontal line, demand curve is a rectangular hyperbola. It is shown:

The reason is that, the price at each level of output declines.
4.
| (P) | (Q) | TR=PxQ | AR(Price)= | MRn=TRn-TRn-1 |
| 10 | 0 | 0 | - | - |
| 10 | 1 | 10 | 10 | 10 |
| 10 | 2 | 20 | 10 | 10 |
| 10 | 3 | 30 | 10 | 10 |
| 10 | 4 | 40 | 10 | 10 |
| 10 | 5 | 50 | 10 | 10 |
| 10 | 6 | 60 | 10 | 10 |
5.
| Q | MR | TR=ΣMR | Demand Curve or Price or \(AR=\frac{TR}{Q}\) | ED |
|---|---|---|---|---|
|
1 |
10 6 2 2 |
10 16 18 20 |
10 8 6 5 |
ED > 1 |
| 5 | 2 | 22 | 4.4 | |
| 6 7 8 |
0 0 0 |
22 22 22 |
3.6 3.2 2.75 |
ED =1 |
| 9 | -5 | 17 | 1.9 | ED < 1 |
Rule: When with the fall in price of goods, total revenue rises, ED > 1, if it remains same ED = 1 and if falls then ED < 1.
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