<|im_start|>system
You are a helpful assistant. You first think about the reasoning process in the mind and then provide the user with the answer. You should try to truely solve the question by yourself without cheating.  <|im_end|>
<|im_start|>user
 Two couriers, $A$ and $B$, start simultaneously from two locations, $M$ and $N$, towards a point $P$. The distance from $N$ to $P$ is $30 \mathrm{~km}$ greater than the distance from $M$ to $P$. Each courier completes their journey in 15 hours. How far is location $M$ from point $P$, if courier $B$ takes one hour less than courier $A$ to cover every $60 \mathrm{~km}$? Show your work in <think> </think> tags. And return the final answer in <answer> </answer> tags.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>
user
150
Two couriers, $A$ and $B$, start simultaneously from two locations, $M$ and $N$, towards a point $P$. The distance from $N$ to $P$ is $30 \mathrm{~km}$ greater than the distance from $M$ to $P$. Each courier completes their journey in 15 hours. How far is location $M$ from point $P$, if courier $B$ takes one hour less than courier $A$ to cover every $60 \mathrm{~km}$?
test