The correct option is D 70 cm
The sheet of paper is in the shape of a cuboid Therefore
Volume of the cuboid=Volume of the cylinder
or 7000×100×h×0.022=227r2h
(Since length is given in meters it is converted into centimeters by multiplication with 100)
or r2=7000×100×0.022×722=70×70
or r=70 cm