D) How much iron is needed to make a rod of length 90 cm and diameter 14 cm?
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Answered by
3
Answer:
Total length = 90 cm
Diameter = 1.4 cm
Radius = 0.7 cm
Total iron required = Volume of cylinder
= πr²h = 227×0.7×0.7×90 = 138.6 cm³
Thus, 138.6 cm3 of iron is required.
Answered by
8
Answer:
answer is 13860cm³
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