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ML Aggarwal Solutions Class 10 Mathematics Solutions for Mensuration Exercise 17.1 in Chapter 17 - Mensuration
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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 m3.
Answer:
Solution:
The capacity of a cylinder is measured by its volume, which determines how much material it can carry.
Given height of the pole, h = 7 m
Diameter of the pole, d = 20 cm
radius, r = d/2 = 20/2 = 10 cm = 0.1m
Volume of the pole = π r2h
= (22/7)×0.12×7
= 0.22 m3
Weight of wood per m3 = 225 kg
weight of 0.22 m3 wood = 225×0.22 = 49.5 kg
Hence the weight of the wood is 49.5 kg. 
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