Question

the circumference of right circular cylinder is 440 cm and its height is 5 cm find the lateral surface area of the cylinder​

Answer 1

Circumference= 2π r = 440 cm,

Height = h= 5 cm,

So, lateral area = 2π r* h ,

= circumference* height,

= 440*5,

= 2200 cm².

NOW, THAT'S THE CORRECT ANSWER.

Answer 2

Given,

Circumference of circle = 440 cm

Height of cylinder = 5 cm

we know that

$circumference =2\pi r$

$440 = 2 \times \frac{22}{7} \times r$

$r = 440 \times \frac{7}{44}$

$r = 70cm$

Now we have,

$laterl \: surface \: area = 2\pi rh$

$= 2 \times \frac{22}{7} \times 70 \times 5$

$= {2200cm}^{2}$

Teddy :D