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

The rate of decay of certain substance is directly proportional to the amount present at that instant. Initially, there are $$27 \mathrm{~gm}$$ of certain substance and $$3 \mathrm{~h}$$ later it is found that $$8 \mathrm{~gm}$$ are left, then the amount left after one more hour is

A
$$\frac{20}{3} \mathrm{~gm}$$
B
$$\frac{16}{3} \mathrm{~gm}$$
C
$$\frac{19}{3} \mathrm{~gm}$$
D
$$\frac{17}{3} \mathrm{~gm}$$
2
MHT CET 2020 16th October Morning Shift
MCQ (Single Correct Answer)
+2
-0

The direction cosines of a line which is perpendicular to lines whose direction ratios are $$3,-2,4$$ and $$1,3,-2$$ are

A
$$\frac{4}{\sqrt{297}}, \frac{5}{\sqrt{297}}, \frac{16}{\sqrt{297}}$$
B
$$\frac{8}{\sqrt{285}}, \frac{10}{\sqrt{285}}, \frac{11}{\sqrt{285}}$$
C
$$\frac{-8}{\sqrt{285}}, \frac{10}{\sqrt{285}}, \frac{11}{\sqrt{285}}$$
D
$$\frac{-8}{\sqrt{285}}, \frac{-10}{\sqrt{285}}, \frac{11}{\sqrt{285}}$$
3
MHT CET 2020 16th October Morning Shift
MCQ (Single Correct Answer)
+2
-0

The points of discontinuity of the function

$$\begin{aligned} f(x) & =\frac{1}{x-1}, \text { if } 0 \leq x \leq 2 \\ & =\frac{x+5}{x+3} \text { if } 2< x \leq 4 \end{aligned}$$

in its domain are

A
$$x=1, x=2$$
B
$$x=0, x=2$$
C
$$x=2$$ only
D
$$x=4$$ only
4
MHT CET 2020 16th October Morning Shift
MCQ (Single Correct Answer)
+2
-0

If the angle between the lines given by the equation $$x^2-3 x y+\lambda y^2+3 x-5 y+2=0, \lambda \geq 0$$, is $$\tan ^{-1}\left(\frac{1}{3}\right)$$, then $$\lambda=$$

A
$$1, \frac{2}{5}$$
B
10
C
2
D
$$\frac{2}{3}, 40$$
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