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1
MHT CET 2020 16th October Morning Shift
MCQ (Single Correct Answer)
+2
-0

The equation of tangent at $$P(-4,-4)$$ on the curve $$x^2=-4 y$$ is

A
$$2 x-y+4=0$$
B
$$2 x+y-4=0$$
C
$$3 x-y+8=0$$
D
$$2 x+y+4=0$$
2
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+2
-0

- The edge of a cube is decreasing at the rate of $0.04 \mathrm{~cm} / \mathrm{sec}$. If the edge of the cube is 10 cms , then rate of decrease of surface area of the cube is...

A
$4.8 \mathrm{~cm}^2 / \mathrm{sec}$
B
$4.08 \mathrm{~cm}^2 / \mathrm{sec}$
C
$48 \mathrm{~cm}^2 / \mathrm{sec}$
D
$4.008 \mathrm{~cm}^2 / \mathrm{sec}$
3
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+2
-0

If $r$ is the radius of spherical balloon at time $t$ and the surface area of balloon changes at a constant rate $K$, then......

A
$4 \pi r^2=\frac{K t^2}{2}+c$
B
$8 \pi r^2=K t+c$
C
$\pi r^2=\frac{K t^2}{2}+c$
D
$4 \pi r^2=\dot{K} t+c$
4
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+2
-0

The slope of normal to the curve $x=\sqrt{t}$ and $y=t-\frac{1}{\sqrt{t}}$ at $t=4$ is ..........

A
$\frac{-17}{4}$
B
$\frac{4}{17}$
C
$\frac{-4}{17}$
D
$\frac{17}{4}$
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