Two disc having same moment of inertia about their axis. Thickness is $t _ { 1 }$ and $t _ { 2 }$ and they have same density. If $R _ { 1 } / R _ { 2 } = 1 / 2$, then find $t _ { 1 } / t _ { 2 }$. (A) 4 (B) $1 / 4$ (C) $1 / 16$ (D) 16
Two thin circular rings are lying in the same plane and are touching each other at a single point. The first ring has mass 5 kg and radius 10 cm , while the second ring has mass 10 kg and radius 20 cm . Find the moment of inertia of the combined system about a straight line passing through the point of contact and lying in the plane of the rings. (A) $\frac { 27 } { 50 } \mathrm {~kg} \mathrm {~m} ^ { 2 }$ (B) $\frac { 24 } { 40 } \mathrm {~kg} \mathrm {~m} ^ { 2 }$ (C) $\frac { 27 } { 40 } \mathrm {~kg} \mathrm {~m} ^ { 2 }$ (D) $\frac { 17 } { 12 } \mathrm {~kg} \mathrm {~m} ^ { 2 }$
If $A = \left[ \begin{array} { l l } 2 & 3 \\ 3 & 5 \end{array} \right]$, then the value of $\left| \vec { A } ^ { 2025 } - 3 A ^ { 2024 } + A ^ { 2023 } \right|$ is
If the domain of the function $\frac { 1 } { \ln ( 10 - x ) } + \sin ^ { - 1 } \left( \frac { x + 2 } { 2 x + 3 } \right)$ is $( - \infty , - a ] \cup ( - 1 , b ) \cup ( b , c )$, then $( b + c - 3 a )$ is equal to (A) $20 - \frac { 5 } { 3 }$ (B) $21$ (C) 23 (D) 24
If $6 \left( \int _ { 1 } ^ { \mathbf { x } } \mathbf { f } ( \mathbf { t } ) \mathbf { d t } \right) = 3 \left( \mathbf { x } \mathbf { f } ( \mathbf { x } ) + \mathbf { x } ^ { 3 } - 4 \right)$, then find the value of $\mathbf { f } ( 2 ) - \mathbf { f } ( 3 )$
Let $\mathrm { M } = \{ 1,2,3 , \ldots , 16 \}$ and R be a relation on M defined by xRy if and only if $4 y = 5 x - 3$. Then, the number of elements required to added in R to make it symmetric is (A) 3 (B) 2 (C) 5 (D) 4
If the area of the region $\left\{ ( x , y ) : x ^ { 2 } + 1 \leq y \leq 3 - x \right\}$ is divided by the line $x = - 1$ in the ratio $m : n$ (where $m$ and $n$ are coprime natural numbers). Then, the value of $\mathrm { m } + \mathrm { n }$ is