How Much Iron is Needed to Make a Rod of Length 90 Cm and Diameter 1.4 Cm? - SSC (English Medium) Class 8 - Mathematics
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How much iron is needed to make a rod of length 90 cm and diameter 1.4 cm?
Total length = 90 cm
Diameter = 1.4 cm
Radius = 0.7 cm
Total iron required = Volume of cylinder
= πr²h = `22/7 xx 0.7 xx 0.7 xx 90` = 138.6 cm³
Thus, 138.6 cm3 of iron is required.
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Solution How Much Iron is Needed to Make a Rod of Length 90 Cm and Diameter 1.4 Cm? Concept: Volume of a Cylinder.