Question

solve this problem its fast with clear and explanation I mark as brainlest

Answer 1

Answer:

Step-by-step explanation:

Let x be the width in meters of the roll of newspaper.

We need to use consistent units; so call the thickness of the newspaper 0.00022m.

1m = 100cm

Spread out into a rectangular sheet, the newspaper is a very thin rectangular solid with length 7000, width x, and thickness 0.00022. The volume is then 1.54x cubic meters.

=> Volume = l*b*h

=> 7000*0.00022*x = 1.54 x

When rolled into a cylinder, the volume will be the same.

Volume of cylinder= πr²h

The height of the cylinder is the width of the newspaper. So,

1.54x =πr²*x

r² = 1.54/π

Base area = πr²

=> π*1.54/π

=> 1.54 m²