A roller bottle culture vessel perfectly cylindrical in shape having inner radius (r) = 10 cm and length (l) = 20 cm was fitted with a spiral film of length (L) = 30 cm and width (W) = 20 cm. If the film can support 105 anchorage dependent cells per cm2, the increase in the surface area after fitting the spiral film and the additional number of cells that can be grown respectively are

A roller bottle culture vessel perfectly cylindrical in shape having inner...

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A. 1200 cm² and 12 × 10⁷ cells

B. 600 cm² and 6 × 10⁷ cells

C. 600 cm² and 8300 cells

D. 1200 cm² and 8300 cells

Answer: Option B

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