1
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

The feasible region represented by the constraints:

$$ \begin{aligned} & x+2 y \leq 120 \\ & x+y \geq 60 \\ & x-2 y \geq 0 \\ & x \geq 0 \text { and } y \geq 0 \end{aligned} $$

COMEDK 2026 Afternoon Shift Mathematics - Linear Programming Question 1 English
A

A

B

C

C

B

D

D

2
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

$$ \text { The range of the relation } R=\left\{(x, y): y=x+\frac{6}{x} \text {; where } x, y \in \mathbb{N} \text { and } x<6\right\} \text { is: } $$

A

$\{1,2,3\}$

B

$\{5,6\}$

C

$\left\{5, \frac{11}{2}\right\}$

D

$\{5,7\}$

3
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

Let A be a square matrix of order $3 \times 3$. If $|A|=-4$, then the value of $\left|\frac{A^{-1}}{-2}\right|$ is:

A

$-1$

B

$2$

C

$\frac{1}{32}$

D

$-\frac{1}{16}$

4
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

An open hemispherical storage tank has radius 13 m . Oil flows into the tank such that the depth ' $\boldsymbol{h}$ ' of oil in the tank changes at the rate of $3 \mathrm{~m} / \mathrm{hr}$. When the depth $\boldsymbol{h}=1 \mathrm{~m}$, the rate of change of the area of the top surface of the oil is

A

$72 \pi \mathrm{~m}^2 / \mathrm{hr}$

B

$75 \pi \mathrm{~m}^2 / \mathrm{hr}$

C

$24 \pi \mathrm{~m}^2 / \mathrm{hr}$

D

$26 \pi \mathrm{~m}^2 / \mathrm{hr}$