a hollow iron pipe is 2m long. it's diameter is 10cm and it is 1cm thick. Calculate the weight of the pipe if iron weighs 8.2mg/cm3
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Answer:
Hello mate..
Step-by-step explanation:
Given that,
external diameter = 8 cm
external radius = R =4 cm
thickness= 1 cm
so, internal diameter= (8-1) cm = 7 cm
internal radius = r = 3.5 cm
volume of iron = π(R²- r²)h
=> 247.5 cm³
weight of iron = 247.5× 8 = 1980 gram or 1.98 kg
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