A solid iron rectangular block of dimensions 4.4m, 2.6m and 1m is cast into a hollow cylindrical pipe of internal radius 30cm and thickness 5cm. Find the length of the pipe.

Explanation

Given

Internal radius `r=30 cm`

Thickness `w=5 cm
`

External radius `R=30+5=35 cm`

Let the length of pipe be h.


Here,

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