A solid rectangular block of copper 5 cm by 4 cm by 2 cm is drawn out to make a cylindrical wire of diameter 2 mm. Calculate the length of the wire
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πr^2h=lbh'
22/7×10^-6×h=5×4×2×10^-6
22/7×h=40
h=40×1/3.14 = 12.73 m
22/7×10^-6×h=5×4×2×10^-6
22/7×h=40
h=40×1/3.14 = 12.73 m
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