Nueve grifos abiertos durante 10 horas diarias han proporcionado cierta cantidad de agua que tiene un costo de $20.000. Averiguar el costo del agua de los 15 grifos abiertos durante 12 horas diarias

The water cost will be $40,000

(El costo del agua será de $40,000)

Step-by-step explanation:

To solve this problem we can use rule of three:

9 taps opened for 10 hours a day have a water cost of 20000

15 taps opened for 12 hours a day have a water cost of X

The number of taps and the water cost are direcly proportional: if the number of taps increase, the amount of water increase, and so the total water cost increases.

The number of hours per day opened is also direcly proportional to the cost: more hours opened = more water = more cost.

So, we can write this equation:

(9 * 10) / (15 * 12) = 20000/X

90/180 = 20000/X

X = 20000*180/90 = 40000

The water cost will be $40,000