A recording tape 0.01 cm thick is wound around a reel whose inner radius is 1 cm and outer radius is 4 cm. How much tape is required to fill the reel?
A) 1885 cm
B) 1178 cm
C) 4712 cm
D) 2827 cm
E) 5238 cm

Question

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The Answer of A recording tape 0.01 cm thick is wound around a reel whose inner radius is 1 cm and outer radius is 4 cm. How much tape is required to fill the reel?
A) 1885 cm
B) 1178 cm
C) 4712 cm
D) 2827 cm
E) 5238 cm

A Recording Tape 0