An Important Question of class 10 Based on Mensuration Chapter of M.L Aggarwal for ICSE BOARD.

Here a wooden pole is given with its height and diameter.

Find its weight if the wood weighs 225 kg per m cube.

This is the Question Number 08, Exercise 17.1 of M.L Aggarwal.

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# A wooden pole is 7 m high and 20 cm in diameter. Find its weight if the wood weighs 225 kg per m cube.

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Given height of the pole, h = 7 mDiameter of the pole, d = 20 cmradius, r = d/2 = 20/2 = 10 cm = 0.1mVolume of the pole = r^{2}h= (22/7)Ã—0.1^{2}Ã—7= 0.22 m^{3}Weight of wood per m^{3}Â = 225 kgweight of 0.22 m3 wood = 225Ã—0.22 = 49.5 kgHence the weight of the wood is 49.5 kg.