a cylinder has a diameter of of 20 cm. the area of cured surface is 100 square cm find the height of the cylinder correct to one decimal place and the volume of the cylinder correct to one decimal place
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r=10cm
CSA=100cm²
CSA(cylinder)=2Πrh
100=2×22/7×10×h
5=22/7×h
35/22=h
h=1.6cm
V(cylinder)=Πr²h
=22/7×100×1.6
=22×22.9
=503.8cm³
Hence the height of cylinder is 1.6cm and volume is 503.8cm³
CSA=100cm²
CSA(cylinder)=2Πrh
100=2×22/7×10×h
5=22/7×h
35/22=h
h=1.6cm
V(cylinder)=Πr²h
=22/7×100×1.6
=22×22.9
=503.8cm³
Hence the height of cylinder is 1.6cm and volume is 503.8cm³
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diameter of cylinder= 20cm
radius=20÷2=10 cm
radius=20÷2=10 cm
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