a cylindrical tube open at both ends is made of iron 3cm if the external diameter is 42 cm and the length of the tube is 140 cm find the volume of the metal used in it
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Answer:
194040cm cube
Step-by-step explanation:
volume of cylinder=pie ×r square ×h
=22/7×42/2×42/2×140
=22×441×140/7
22×441×20
=194040
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