Jee Main
Rotational Motion
JEE Main 2025 (Online) 8th April Evening Shift
INTEGER+4 / -12025
A thin solid disk of 1 kg is rotating along its diameter axis at the speed of 1800 rpm . By applying an external torque of $25 \pi ~\mathrm{Nm}$ for 40 s , the speed increases to 2100 rpm . The diameter of the disk is ___________ m.