Question 18
If we rotate a right-angled triangle of height 5 cm and base 3 cm about its base, we get
a) Cone of height 3 cm and base 3 cm
b) Cone of height 5 cm and base 5 cm
c) Cone of height 5 cm and base 3 cm
d) Cone of height 3 cm and base 5 cm

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Solution

If we rotate a right-angled triangle of height 5 cm and base 3 cm about its base, we get a cone of height 3 cm and base radius 5 cm.

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Question 17
If we rotate a right-angled triangle of height 5 cm and base 3 cm about its height a full turn, we get

a) Cone of height 5 cm, base 3 cm

b) Triangle of height 5 cm, base 3 cm

c) Cone of height 5 cm, base 6 cm

d) Triangle of height 5 cm, base 6 cm

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