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Let initial r=100
And initial h=100
∴ initial volume =π(100)
2
×100
later volume =π(90)
2
×h
According to condition
π(90)
2
×h
π(90)
2
×h=π(100)
2
×100
h=
90×90
100×100×100
=
81
10000
=123.45679
∴ % increment in height =123.45−100=23.45
And initial h=100
∴ initial volume =π(100)
2
×100
later volume =π(90)
2
×h
According to condition
π(90)
2
×h
π(90)
2
×h=π(100)
2
×100
h=
90×90
100×100×100
=
81
10000
=123.45679
∴ % increment in height =123.45−100=23.45
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