Answer :
Diagonal of rectanglular prism = √a² + b² + c²
= √8² + 4² + 3²
= √89
= 9.43
Thus, the pencil is 9.43 cm long.
= √8² + 4² + 3²
= √89
= 9.43
Thus, the pencil is 9.43 cm long.
[tex]the\ length\ of\ the\ pencil= the\ length\ of\ the\ diagonal=\\.\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ = \sqrt{a^2+b^2+c^2} \\\\\sqrt{a^2+b^2+c^2} = \sqrt{8^2+4^2+3^2} = \sqrt{64+16+9} = \sqrt{89}\approx9.43\ [cm] \\\\Ans.\ the\ length\ of\ the\ pencil\ is\ about\ 9.43\ [cm][/tex]
