Mathematics
Grade9
Easy
Question
A rectangular lap pool measures 80 feet long by 20 feet wide. If it needs to be filled to four feet deep and each cubic foot holds 7.5 gallons, how many gallons will it take to fill the lap pool?
- 1357.2 m3
- 26.95 m3
- 48000 gallons
- 206.4 ft3
Hint:
when it comes to mensuration one can find attributes of an structure in any method. Anyhow, once one has got an expression for volume of a structure then, substitute the values given and find the values needed.
The correct answer is: 48000 gallons
In geometry, a rectangular prism is a polyhedron with two congruent and parallel bases. It is also called a cuboid. A rectangular prism has six faces, and all the faces are in a rectangle shape and have twelve edges. Because of its cross-section along the length, it is said to be a prism.
Given That:
A rectangular lap pool measures 80 feet long by 20 feet wide. If it needs to be filled to four feet deep and each cubic foot holds 7.5 gallons, how many gallons will it take to fill the lap pool?
>>>Volume of any structure = (Area of the Base)
(Height)
>>>Then, the volume of the prism = (Length)(Width)(Height)
= (80)(20)(4)
= 6400 feet3.
>>>Therefore, number of gallons needed are= 64007.5
= 48000
>>>Hence, the number of gallons needed are 48000.
Volume = 80×20×4
= 6400 feet3
No. of gallons = 6400 × 7.5
= 48,000 gallons
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