SOLUTION: Please help with the homework below:
The external radius of a water tank of height 1,75m, made of wood 20mm thick, is 0,45m. How many square meters of waterproofing material will
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Question 1206900: Please help with the homework below:
The external radius of a water tank of height 1,75m, made of wood 20mm thick, is 0,45m. How many square meters of waterproofing material will be needed to line the sides and bottom of the water tank?
Found 2 solutions by MathLover1, ikleyn:
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!
given:
external radius
height
thick=
=>internal radius
Total surface area
, where is the radius of the base and is the height of the tank.
Answer by ikleyn(52781) (Show Source): You can put this solution on YOUR website!
.
Due to unknown reason, @MathLover calculated the total surface area of the tank,
including its top (the lid),
although the problem asked calculate the side area plus the bottom area, only.
So, the solution and the answer by @MathLover1 both are incorrect.
This problem was posted to this forum several days ago.
It was solved by @mananth under this link
https://www.algebra.com/algebra/homework/Finance/Finance.faq.question.1206847.html
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Couple of notices at the end.
I don't know, what are the rules of formatting real numbers in your country.
But here, in the US, they never write 1,75m or 0,45m - - - it is of existing rules.
The correct format is 1.75m or 0.45m.
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