2006-11-06 12:16:59 · 8 answers · asked by soccergrl8128 1 in Science & Mathematics ➔ Mathematics
These are just similar ratios:
500 gallons / 20 minutes = x gallons / 30 minutes
500 / 20 = x / 30
Now solve for x (you can cross multiply if you like):
20x = 15000
x = 750 gallons.
It's also rather intuitive to see that you got 500 gallons in 20 minutes. So in 10 minutes more, you will pump half again as much. 500 + 250 = 750 gallons.
2006-11-06 12:25:50 · answer #1 · answered by Puzzling 7 · 0⤊ 0⤋
Do 500/20 = 25 gallons per minute. Multiply the 25 gallons per minute by the 30 minutes to get how much gas is pumped during that time period, which results in 25 x 30=750 gallons. The answer is 750 gallons in 30 minutes.
2006-11-06 12:19:27 · answer #2 · answered by Evan L 2 · 0⤊ 0⤋
It can pump 500 gallons * 30 min / 20 min = 750 gallons
2006-11-06 12:20:41 · answer #3 · answered by heartsensei 4 · 0⤊ 0⤋
750
2006-11-06 12:26:46 · answer #4 · answered by phyllis_neel 5 · 0⤊ 0⤋
20minutes=500gallons
30minutes=xgallons
x=(30*500)/20
=15000/20
=750 gallons
2006-11-06 12:26:38 · answer #5 · answered by Anonymous · 0⤊ 0⤋
750 gallons
2006-11-06 12:19:51 · answer #6 · answered by Paraka 2 · 0⤊ 0⤋
Any proportional math quest. is always easy. You have (20min/500gal)(30min/?). So all you have to do is cross multiply. 500 x 30=150000/20=750 gallons. It makes it soo easy. :)
2006-11-06 12:22:18 · answer #7 · answered by becka4 1 · 0⤊ 0⤋
750!!!!!!!!!!!!!!!!!!!!!
2006-11-06 12:21:31 · answer #8 · answered by mini lop lover 2 · 0⤊ 0⤋