1
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

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

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

$$ \text { The second derivative of } \sin 3 \boldsymbol{x} \boldsymbol{\operatorname { c o s }} \mathbf{5 x} \text { is: } $$

A

$2 \sin 2 x+32 \sin 8 x$

B

$2 \sin 2 x+16 \sin 8 x$

C

$2 \sin 2 x-16 \sin 8 x$

D

$2 \sin 2 x-32 \sin 8 x$

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

If $\mathop {\lim }\limits_{x \to 0}\left(\frac{p \sin 2 x+1-\cos 2 x}{x+\tan x}\right)=1$ then the value of ' $p$ ' is

A

$2$

B

$-1$

C

$1$

D

$\frac{1}{2}$

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

Let the line $L_1$ be a line passing through the point $(\mathbf{0},-\mathbf{6})$ and making an angle of $\mathbf{1 5 0}^{\circ}$ with the positive $x$-axis. Then the equation of a line $L_2$ parallel to $L_1$ and crossing the $y$-axis 2 units below the origin is:

A

$$ x \sqrt{3}+y+6=0 $$

B

$$ x-\sqrt{3} y+6 \sqrt{3}=0 $$

C

$$ x-\sqrt{3} y-2 \sqrt{3}=0 $$

D

$$ x+\sqrt{3} y+2 \sqrt{3}=0 $$