An electric water heater consumes 2.5 kW. Suppose I am taking 2 showers per day, for one month. The cost of electricity is 0.15 $/kWh. With a monthly budget of $10 on average, how much time am I allowed to spend at most for each shower?
O Less than 30 min
O Between 30 min and 1 hour
O More than one hour