Water tax is increased by 20% but its consumption is decreased by 20%. Then, the increase or decrease in the expenditure of the money is : Choose the correct choice from the following choices:
A) No change	B) 5% decrease	C) 4% increase	D) 4% decrease	E) None
Explanation:   Let tax=Rs.100 and   Consumption=100 units   Original expenditure = Rs.(100×100)=Rs.10000(100×100)=Rs.10000   New expenditure = Rs.(120×80)=Rs.9600(120×80)=Rs.9600   4% decreaseecrease in expenditure   = (400/10000×100)%=4%   Correct Option: 4% decrease
<result>D</result>
Water tax is increased by 20% but its consumption is decreased by 20%. Then, the increase or decrease in the expenditure of the money is :