Tick (✓) the correct answer:


Tick (✓) the correct answer:

The height of a cylinder is 80 cm and the diameter of its base is 7 cm. The whole surface area of the cylinder is

(a) 1837 cm2

(b) 1760 cm2

(c) 1942 cm2

(d) 3080 cm2


(a) $1837 \mathrm{~cm}^{2}$

Diameter $=7 \mathrm{~cm}$

Radius $=3.5 \mathrm{~cm}$

Height $=80 \mathrm{~cm}$

$\therefore$ Total surface area $=2 \pi \mathrm{r}(\mathrm{r}+\mathrm{h})=2 \times \frac{22}{7} \times 3.5(3.5+80)=22(83.5)=1837 \mathrm{~cm}^{2}$

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