## Question

**Joshi sir comment**

length for one turn = 3

Draw diagonal of a rectangle then turn it as a cylinder, you will get the construction given in the question.

$Intrianglel=\sqrt{{3}^{2}+{n}^{2}}\phantom{\rule{0ex}{0ex}}Sototallengthofwirehavingnturn=n\sqrt{{3}^{2}+{n}^{2}}\phantom{\rule{0ex}{0ex}}Comparewith20andsolve$

## Read 1 Solution.

i understood that method...is there a method using calculus?

**LUFFY**1 Month ago is this solution helpfull: 0 0