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1. |
The diameters of two cones are equal. If their slant heights be in the ratio of 5 : 7, then find the ratio of their curved surface areas. ? |
A. | 25 : 7 |
B. | 25 : 49 |
C. | 5 : 49 |
D. | 5 : 7 |
Answer» E. | |