1.

A right circular cone resting on its base is cut at (4)/(5)th its height along a plane parallel to the circular base . The height of original cone is 75 cm and base diameteris 42 cm.What is the base radius of cut out top portion cone ?

Answer»

a. 4.2 CM
B. 2.8 cm
C. 3.5 cm
d. 8.4 cm

ANSWER :A


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