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

Explanation

Solid iron rectangular block of dimension `4.4 {~m} \times 2.6 {~m} x / {m}` Internal radius of hollow cylindrical pipe `=30 {~cm}=r` Thickness of hollow cylindrical pipe `=w=5 {~cm}` then internal radius `R` of hollow cylinder `=30+5=35 {~cm}`


Let `h `be the length of pipe.


Volume of cuboid = Volume of hollow cylinder


`=440 \times 260 \times 100=\pi\left(R^{2}-r^{2}\right) h `


...