Question

the external diameter of the barrel of an air gun is found to be 1.62 cm and the thicknesd of the metal is 7mm.find in cm the internal diameter.​

Answer 1

Answer:

1.62cm - 7mm = 16.2 mm - 7 mm = 9.2 mm

Step-by-step explanation:

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Answer 2

Internal diameter is 0.22 cm

Step-by-step explanation:

External Diameter of gun = 1.62 cm

External radius of gun = $\frac{Diameter}{2} =\frac{1.62}{2}=0.81 cm$

Thickness of the metal is 7mm.

1 mm = 0.1 cm

So, 7 mm = 0.7 cm

Internal radius  = External radius - Thickness = 0.81-0.7 = 0.11 cm

Internal diameter = 0.11 \times 2 = 0.22 cm

Hence Internal diameter is 0.22 cm

#Learn more:

Construct a hollow metallic sphere of internal diameter 10 m and external diameter 13 m . find volume

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