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Deepak Bora
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Asked: 2020-07-26T22:05:29+05:30 In:

A solid iron pole consists of a cylinder of height 220 cm and base diameter 24 cm, which is surmounted by another cylinder of height 60 cm and radius 8 cm. Find the mass of the pole, given that 1 cm³ of iron has approximately 8 gm mass. (Use ∏ = 3·14)

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CBSE 10th Class past year question paper

Year 2019

SET 1, Code umber- 30/2/1

Question number – 25

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    1. Newbie
      A solid iron pole consists of a cylinder of height 220 cm and base diameter 24 cm, which is surmounted by another cylinder of height 60 cm and radius 8 cm. Find the mass of the pole, given that 1 cm³ of iron has approximately 8 gm mass. (Use ∏ = 3·14)

      Total volume = 3.14 (12)² (220) + 3.14(8)² (60) cm³
      = 99475.2 + 12057.6 = 111532.8 cm³

      Mass = (111532.8 × 8 ) / 1000 kg

      = 892.262 kg

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