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in Surface Areas And Volumes by (49.9k points)
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The volume of a circular iron rod of length 1m is 3850 cm3. Find its diameter.

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Given volume of circular iron rod is 3850 cm3

But we know that Volume of cylinder = πr2h

3850= 22/7 × r × r × 100

r2= 3850 × 7/100 × 22

r = 1.75 × 7

r= 3.5cm

Therefore diameter = 2 × r

Diameter= 2 × 3.5 = 7cm

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