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  1. The radii of two cylinders are in the ratio of 3 : 2 and their heights are in the ratio 3 : 7. The ratio of their volumes is :
    1. 4 : 7
    2. 7 : 4
    3. 28 : 27
    4. 27 : 28
Correct Option: D

r1
 =
3
 :
h1
 =
3
r22h27

∴
V1
 =
πr1²h1
 =
r1
 ² ×
h1
V2πr2²h2r2h2

=
3
 ² ×
3
27

=
9
 ×
3
 =
27
 = 27 : 28
4728


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