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 KCSE Mathematics Paper 1 Revision Questions and Answers Set 9

The diagram below shows a wooden structure comprising of two blocks. The bottom block measures 1m long, 50cm wide and 20cm high. A circular hole of radius 10cm is drilled right through the bottom block as shown. The top block measures 40cm long, 20cm wide and 30cm high.
tp10949.JPG
a)Calculate
i)the cross-sectional area of wood in the bottom block.(take ะป=3.142)
ii)the volume of wood in the bottom block
iii)the volume of wood on the top block
iv) the total volume of wood in the structure
b)Given that the wood has a density of 0.5 g/cm3, find the mass of the structure in kilograms

 (8m 41s)
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