Question

2. A cylinder is 2 m long and has its diameter 1.4 cm.
Around the curved surface of the cylinder a wire 0.5
cm in diameter has been wrapped so that it may cover
it completely. Find the length and volume of the wire.​

Answer 1

Answer:

$\huge\sf\purple{Answer:}$

Given that :-

• A cylinder is 2 m long and has its diameter 1.4 cm.

• Around the curved surface of the cylinder a wire 0.5
• cm in diameter has been wrapped .

To find :-

• The length and volume of the fire.

$\huge\boxed{Solution:-}$

length: 2m =200cm

height=200cm

diameter: 1.4cm

radius: 0.5cm

volume: πr^2h

22/7×0.5×0.5×200

22×5×2

22×14

345.62cm^2

The volume of the cylinder is 345.62cm^2

Answer 2

$\large \bold{ \underline{ \underline{ \: Answer : \: \: \: }}}$

$\to$ The volume of the cylinder is 300 cm²

$\large \bold{ \underline{ \underline{ \: Explaination : \: \: \: }}}$

Given ,

Length or Height = 2 m = 200 cm

Diameter = 1.4 cm

Radius = 0.7 cm

$\fbox{ \fbox{ \bold{ \: Volume = \pi {(r)}^{2} h \: }}}$

$\to \frac{22}{7} \times 0.7 \times 0.7 \times 200 \\ \\ \to 22 \times 7 \times 2 \\ \\ \to 22 \times 14 \\ \\ \to 300 \: \: \bold {{cm}^{2} }$

Therefore , the volume of the cylinder is 300 cm²