Question

A roll of news paper of length 7000 m and thickness 0.022cm is rolled into a solid cylinder, then it's radius is​

Answer 1

Answer:

r=70.01 cm

Step-by-step explanation:

Length of the sheet : l

Height of the sheet : h

Thickness of the sheet : t

Radius of the solid cylinder : r

Volume of the sheet : V=lth

Volume of the solid cylinder is the same : V=(pi)(r^2)h

lth=(pi)(r^2)h

r=sqrt (lt/(pi))

Putting in the numerical values and paying attention to the units of the lengths the answer is

r=70.01 cm

Answer 2

radius is 70.01....

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