Question

find the volume of metal in the hollow pipe of internal radius 3 cm ,metal 1 cm thick and length 6 cm

Answer 1

Hi.

Here is your answer---

Given---

Outer Radius(R) = 3 cm.
Inner Radius(r) = 1 cm.
Length(h) = 6 cm.

Using the Formula,

    Volume of Material(or Metal) = π h( R² - r²)
                                                  = (22/7) × 6 × (3² - 1²)
                                                  = (22/7) × 6 × ( 9 - 1)
                                                  = (22/7) × 6 × 8
                                                  = 1056 cm³.

Thus, the volume of the metals in th pipe is 1056 cm³.

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Hope it helps.

Have a nice day.