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A $2\mathrm{.}4-$kN$-$m torque $T$ is applied to the solid cylinder made up of a hollow cylinder and an inner core as shown.

NOTE: This is a multi$-$part question. Once an answer is submitted, you will be unable to return to this part.

Problem $03\mathrm{.}003.$b $-$Torsion of a solid cylindrical shaft

Determine the percent of the torque carried by the inner $25-$mm$-$diameter core.

The percent of the torque carried by the inner $25-$mm$-$diameter core is