A piece of metal pipe is 77cm , longthe inside diameter of a cross-section is 4cm.If the metal weight 8 gm per cu.cm. What is the weight of the piece of pipe?
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Answer:
weight =m×g
mass=volume×density
volume={22/7}×16×77=22×16×11=3872 cm^3
density given=8
mass=3872×8 =30976 grams=30.98 kg
weight=30.98×9.8=303.57 newton
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