Question

The volume of a metallic cylinder pipe is 748cm^2. Its length is 14cm and its external radius is 9cm . Then, its thickness is:

Answer 1

Answer:

Step-by-step explanation:

we have,

r=eternal radius of pipe=9cm ,h=length of the pipe=14cm

v=volume of the pipe =748cm

let r be the eternal radius in cm. then,

volume =748cm³

22/7×(9²-r²)×14=748

81-r²=748/44

81-r²=17

r²=64

r=√64=8

thickness of the pipe =R-r=9-8=1cm

thickness of the pipe =1 cm

Answer 2

volume of a cylinder = pie rsquare h

=22÷7×81×14 =748cm^2 =748÷2=8