Question

6. The volume of metallic
cylindrical pipe is 748cm^3. it's
length is 14 cm and its external
radius in 9cm Find its
thickness. ​

Answer 1

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Answer:

1 cm

Step-by-step explanation:

Volume of a hollow Cylinder =π(R

2

−r

2

)h

Given, volume of the hollow cylinder =

7

22

×(9

2

−r

2

)×14=748cm

3

=>9

2

−r

2

=17

=>81−r

2

=17

=>r

2

=64

=>r=8cm

Thickness = Outer radius − Inner radius =9−8=1cm

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