Answer: Total revenue is given by
[tex] TR=P*Q [/tex]
When price of bananas increase from $0.90 to $1.10 a pound and total revenue remained unchanged, it means that the quantity of Bananas sold must have decreased.
Suppose at $0.90 we sold 10 pound bananas getting us $9 revenue.
This means that at $1.10 we have to sell 8 Banana's to get the same amount of revenue.
So, change in quantity = [tex] = \frac{10-8}{10}
= 20% [/tex]
So, their is a decline of 20% in the quantity of Bananas sold.