Last month an orange juice distributor found that the demand for juice was 500 litres each month when the price was $15 per litre. At that time, the price was going up at a rate of $0.50 per month, but due to increased advertising the demand was also going up, at a rate of 30 litres per month. How fast was the revenue increasing?
+118608 Last month an orange juice distributor found that the demand for juice was 500 litres each month when the price was $15 per litre. At that time, the price was going up at a rate of $0.50 per month, but due to increased advertising the demand was also going up, at a rate of 30 litres per month. How fast was the revenue increasing?
Let me see,
Last month the revenue was 500*15 = $7500
This month the revenue will be 530*15.5 = $8215
8215-7500 = $715/month
That sounds right to me......
