SOLUTION: a reservoir measures 180 ft. in diameter and 20 ft. high. How many gallons of water per foot are in this reservoir? A) 190,246 B)648,000 C) 242,352 D) 508, 680 I thought i

Question 342781: a reservoir measures 180 ft. in diameter and 20 ft. high. How many gallons of water per foot are in this reservoir?
A) 190,246
B)648,000
C) 242,352
D) 508, 680
I thought i used this equation (.785)(180ft)^2(20)(7.48 gals) but it never comes close to one of the answers please help if you can it is for my water distrabution class
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!

The question is water per foot?
diameter = 180 feet
radius = 90 feet
height of water = 1 foot.
Volume V = pi*r^2*h
V= pi*90^2*1
V= 508938 cu.ft.
..
1 cu.ft = 7.48 gallons
508,938 cu.ft = 7.48*508938=190,342 gallons
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