Question

the volume of metal in a metallic cylindrical pipe is 748cm². its length is 14cm and its external radius is 9cm . find its thickness.​

Answer 1

Answer:

Step-by-step explanation:

Given that:

Height of the cylindrical pipe (h) = 14cm

Let the external radius of the cylindrical pipe be “R” = 9 cm

Let the internal radius be “r”

The Volume of cylindrical pipe = 748  

The Volume of the  cylinder when the external and internal radius is given is:

volume=πh(R²-r²)

Substituting the values we can find the thickness of pipe “r”:

748=22/7*14(9²-r²)

748=44(81-r²)

748/44=81-r²

17=81-r²

r²=81-17

r²=64

r=√64

r=8

Thus the thickness of pipe is 8 cm