The volume of metallic cylindrical pipe is `748\ c m^3dot` Its length is 14cm and its external radius is 9cm. Find its thickness.

Explanation

Volume of metallic cylindrical pipe is `748cm^3`

Height, `h=14cm`

External radius, `R=9cm`

Let Inner radius be `r cm`

Volume of cylinder = `pih(R^2-r^2)`

`748=22/7xx14(9^2-r^2)`

`44r^2=2816`

`r=8cm`

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