If $\frac 25 = \frac A{60} = \frac {60}B$, what is $A + B$?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
If $\frac 25 = \frac A{60} = \frac {60}B$, what is $A + B$?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
174
If $\frac 25 = \frac A{60} = \frac {60}B$, what is $A + B$?
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