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The radius of a cylinder is increased by 15% and its height is decreased by 20%. Find the percentage change in the volume of the cylinder.
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Dec 21, 2017
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The radius of a cylinder is increased by 15% and its height is decreased by 20%. Find the percentage change in the volume of the cylinder.
Mathematics
high-school
Edgar H
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Edgar H
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first cylinder(V1) =
r²h
insert 10 as r&h
⇒V1 = 1000
second cylinder(V2)=
×11.5² × 8 = 1058
V2-V1 = 58
100 ×
= 5.8% increase
Redaa
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Dec 27, 2017
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Redaa
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