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If the circumference at the base of a ri...

If the circumference at the base of a right ciruclar cone nad the slant height are `120 pi cm` and 10 cm respectively, then the curved surface area of the cone is equal to …………… .

A

`1200 pi cm^2`

B

`600 pi cm^2`

C

`300 pi cm^2`

D

`600 cm^2`

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