SOLUTION: 1.What is the surface area that has a diameter of 3 inches and height of 5 inches? 2.What is the total square feet of a rectangle that is 12 ft x 8ft x11ft? 3.A rectangular swimm

Algebra ->  Surface-area -> SOLUTION: 1.What is the surface area that has a diameter of 3 inches and height of 5 inches? 2.What is the total square feet of a rectangle that is 12 ft x 8ft x11ft? 3.A rectangular swimm      Log On


   

Question 266666: 1.What is the surface area that has a diameter of 3 inches and height of 5 inches?
2.What is the total square feet of a rectangle that is 12 ft x 8ft x11ft?
3.A rectangular swimming pool has a length of 18 ft, width of 10 ft, and a depth of 4ft. What is the volume of water the pool can hold?
Answer by drk(1908) About Me  (Show Source):
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1.What is the surface area that has a diameter of 3 inches and height of 5 inches?
SA+=+2%2Api%2Ar%5E2+%2B+pi%2Ar%2Ah
the diameter = 3, so radius = 1.5
SA+=2+%2Api%2A%281.5%29%5E2+%2B+pi%2A1.5%2A5
so
SA+=++4.5pi+%2B+7.5pi
or
SA+=+12pi
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2.What is the total square feet of a rectangle that is 12 ft x 8ft x11ft?
SA+=+2%2A%28lw+%2B+lh+%2B+wh%29
we get
SA+=+2%2A%2812%2A8+%2B+12%2A11+%2B+8%2A11%29
then
sa+=+2%2A%2896%2B132%2B88%29
sa+=+2%28316%29 or sa+=+632
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3.A rectangular swimming pool has a length of 18 ft, width of 10 ft, and a depth of 4ft. What is the volume of water the pool can hold?
V+=+lwh
or
v+=+18%2A10%2A4
which is
V+=+720 cu. ft.