An iron pillar consists of a cylindrical portion, 2.8 m high and 20 cm in diameter and a cone 42 cm high is surrounding it. Find the weight of the pillar, given that 1 cm³ of iron weighs 7.5 g.
Mensuration
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Question

An iron pillar consists of a cylindrical portion, 2.8 m high and 20 cm in diameter and a cone 42 cm high is surrounding it. Find the weight of the pillar, given that 1 cm3 of iron weighs 7.5 g.

KnowledgeBoat · Accepted Answer

Radius of cylindrical portion, r = = 10 cm Height of the cylindrical portion, h = 2.8 m = 2.8 × 100 = 280 cm Height of the conical portion, H = 42 cm 3 of iron weighs 7.5 g. Volume And Surface Area of solid RSA Mathematics Solutions ICSE Class 10." > From figure, Radius of the conical part = radius of the cylindrical portion = r = 10 cm Volume of iron pole = Volume of cylindrical portion + Volume of conical portion = πr2h + πr2H Given, Weight of 1 cm3 of iron = 7.5 gm. Total weight = 92400 × 7.5 = 693000 gm = kg = 693 kg. Hence, the weight of the pillar is 693 kg.

Mathematics

An iron pillar consists of a cylindrical portion, 2.8 m high and 20 cm in diameter and a cone 42 cm high is surrounding it. Find the weight of the pillar, given that 1 cm³ of iron weighs 7.5 g.

Mensuration

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