Question 1206900
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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  {{{highlight(highlight(AGAINST))}}}  of existing rules.


The correct format is  1.75m  or  0.45m.