Question

What length of a solid cylinder 2cm in diameter must be taken to recast it into a hollow cylinder of length 16cm,internal diameter 20 cm and thickness 2.5 mm?

Answer 1

$\huge\mathbb{A~N~S~W~E~R}$

$<b><i>$

${\huge\color{Red}{Answer~is~ 79~cm }}$

Answer is atteched.



mark as brainliest answer and plz follow me.