Question

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Answer 1

Answer:

Circumference of the base of a right circular cylinder = 220 cm = 2.2 m

Therefore,

$2\pi \: r \: = 2.2$

$2 \times \frac{22}{7} \times r = 2.2$

$r = 2.2 \times \frac{7}{22} \times \frac{1}{2}$

$r = \frac{22}{10} \times \frac{7}{22} \times \frac{1}{2}$

$r \: = \frac{7}{20} m$

formula for lateral surface area of cone is :-

$2\pi \: r \: h$

height given - 2m

$= 2 \times \frac{11 \: 22}{7} \times \frac{7}{20 \: 10 \: 5} \times 2$

[reducing it]

$= 4.4 {m}^{2}$