HKDSE-MATH - 2020 - Paper 1 -

Ans: (a) $700\pi\text{ cm}^3$ (b) $195\pi\text{ cm}^2$

1. Le

Ans: D
Let $r$ and $\theta$ be the radius and the angle of the s

Ans: B
Consider the volume of the right circular cylinder, w

Ans: C
Note that $\Delta OPU \sim \Delta OQT$. Hence, we have

Ans: B
Join $DG$.

Consider $\Delta AEG$ and $\Delta DEG$. Si

Ans: (a) $10\text{ cm}$ (b) No (c) Yes

1. Let $r\text{ cm}$ be th

Ans: C

Note that the regular $6$-sided polygon can be divide

Ans: A

Let $r_1 \text{ cm}$ and $r_2 \text{ cm}$ be the radius

Ans: B

I is true. Let $r\text{ cm}$ be the radius of the sector

Ans: C

Since $\Delta EBF \sim \Delta DAE$, then we have

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Ans: (a) $288\pi\text{ cm}^3$ (b) No

1. Since spheres are simi

Ans: A

Let $r\text{ cm}$ be the radius of the the hemisphere.

Ans: B

Join $PN$.

Let $x\text{ cm}^2$ be the area of $\Delta M

Ans: C

Since $ABCD$ is a rectangle, then we have

$\begin{arr

Ans: (a) $48\text{ cm}$ (b) (i) $3087\pi\text{ cm}^3$ (ii)

Ans: A

Let $r\text{ cm}$ and $h\text{ cm}$ be the base radius

Ans: D

Denote the centre of the larger circle by $O$.

Since $A

Ans: B

Join $R$ and $X$. Let $PX:XQ =r:1$, where $r0$.

Since $