1.

The ratio of curved surface area and volume of a cylinder is 1 ∶ 7. The ratio of total surface area and volume is 187 ∶ 770. What is the respective ratio of its base radius and height?

A. 5 ∶ 8
B. 4 ∶ 9
C. 3 ∶ 7
D. 7 ∶ 10
Answer» E.


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