<|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
 Walking at 5/6th of its usual speed, a cab is 15 minutes late on a journey. If the cab encounters three traffic signals on the way, where the waiting times at each signal are 2 minutes, 4 minutes, and 5 minutes respectively, and the cab's speed varies by 10% due to road conditions, find the usual time it takes to cover the journey without considering traffic signals and varying speeds. 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
75
Walking at 5/6th of its usual speed, a cab is 15 minutes late on a journey. If the cab encounters three traffic signals on the way, where the waiting times at each signal are 2 minutes, 4 minutes, and 5 minutes respectively, and the cab's speed varies by 10% due to road conditions, find the usual time it takes to cover the journey without considering traffic signals and varying speeds.
test