1.

The ratio of the curved surface area of two cones is 1 ∶ 4 and the ratio of slant height of the two cones is 2 ∶ 1. What is the ratio of the radius of the two cones?

A. 1 ∶ 2
B. 1 ∶ 4
C. 1 ∶ 8
D. 1 ∶ 1
Answer» D. 1 ∶ 1


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