-辆货车和一辆客车同时从AB两地出发，相向面行，过4小时两车相遇,相遇后货车再行3小时到达B地,客车每小时行60千米，求AB两地的距离。

我们可以通过以下步骤来求解AB两地的距离：

1. 设货车的速度为\( V \) km/h。
2. 设AB两地的距离为\( D \) km。

根据题意，货车和客车在相向行驶，4小时后相遇。相遇后货车再行驶3小时到达B地。

### 第一步：计算相遇前的总行程

- 客车的速度为60 km/h，4小时行驶的距离为：
  \[
  4 \times 60 = 240 \text{ km}
  \]

### 第二

Explore how to calculate the distance between two cities where a cargo truck and a passenger car travel towards each other, meeting after 4 hours. The cargo truck continues for 3 more hours after the meeting. Includes step-by-step solution with formulas and explanations.

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