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Q1
:
A right triangle with sides 3 cm, 4 cm and 5 cm is rotated the side of 3 cm to form a cone. The volume of the cone so formed is:
A
12
cm
3
B
15
cm
3
C
16
cm
3
D
20
cm
3
Solution
ANS:
A
- 12
cm
3
Clearly, we have
r
= 3 cm and
h
= 4 cm.
Volume =
1
r
2
h
=
1
x
x 3
2
x 4
cm
3
= 12
cm
3
.
3
3
Share :
cm3
Clearly, we have 
Volume =
cm3