The cone

The cone with a base radius of 12 cm and a height of 20 cm was truncated at a distance of 6 cm from the base, thus creating a truncated cone. Find the radius of the base of the truncated cone.

Correct answer:

r2 =  8.4 cm

Step-by-step explanation:

r1=12 cm h=20 cm h2=6 cm  r1:h=r2:(hh2)  r2=r1 hh2h=12 20620=425=425 cm=8.4 cm

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