Answer:
a
Step-by-step explanation:
x=59
x+12+x+x-9=180
3x+3=180
-3 -3
3x=177/3
2/3 of its capacity - 60 * 2/3 gallons = 40 gallons.
Time to fill to 2/3 is 40 / 4/5 = 40 * 5 / 4
= 50 seconds (answer)
