As shown in the figure, AO is the height of the cone, the bottom radius of the cone OB = 0.7, the length of AB is 2.5, then the length of AO is ()
Choices:
A:2.4
B:2.2
C:1.8
D:1.6
Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
Question: As shown in the figure, AO is the height of the cone, the bottom radius of the cone OB = 0.7, the length of AB is 2.5, then the length of AO is ()
Choices:
A:2.4
B:2.2
C:1.8
D:1.6
Please first conduct reasoning, and then answer the question and provide the correct option letter, e.g., A, B, C, D, at the end.
Question: As shown in the figure, AO is the height of the cone, the bottom radius of the cone OB = 0.7, the length of AB is 2.5, then the length of AO is ()
Choices:
A:2.4
B:2.2
C:1.8
D:1.6