Question

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​

Answer 1

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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