The word banik is in the box that are the only words u can use out of the parghgraphs

Metals ^^

Hope this helps

Metals i suppose is the right answer

    the box has volume x^2h.  the cylinder has volume x^2h/4.  v = πr^2h = x^2h/4  πr^2 = x^2/4  r^2 = x^2/(4π)  r = x/(2√π)  b