Question

Pragya wrapped a cord around a circular pipe of radius 4cm and cut of length required of the cord.Then she wrapped it around a square box of side 4cm .did she have any cord left ? (

Answer 1

Hello,

The length of the cord will be 25.14 cm by 2*4*22/7.

The perimeter of the square will be 4*4 = 16.

Therefore, there will be about 9.14 cm length of cord left with pragya.

Hope it helped you.

Regards

Answer 2

♡$\huge\underline\mathcal{Heyaa}$♡

Given- Radius of pipe = 4 cm

Side of square box = 4cm

Then,the cord is wrapped around a square box of side 4 cm

To find- The length of cord left after wrapping over the square box.

Solution-

Length of cord = Circumference of pipe

Circumference of circle =

$2\pi \: r$

$2 \times 3.14 \times 4 = 25.12 \: cm$

So,25.12 cm long wire is required to wrap around the circular pipe.

The length of wire required = The perimeter of square.

$4 \times 4 = 16 \: cm$

Therefore, length of cord left after wrapping over the square box=

Length of cord required to wrap around circular pipe — Length required to wrap around the square box

$25.12 - 16 = 9.12 \: cm$