Thanks, Lookang.

I have made the necessary changes.

Here are some of the typical questions that you can use:

(1) Town A and Town B are 1000 km apart. The speed of the red object (at Town A) is 50 km/h while the speed of the blue object (at Town B) is 100 km/h.
Both the objects start moving at 9 a.m. What time do they meet?

(2) Both objects are at Town A. They start at the same time. The speed of the red object (at Town A) is 50 km/h while the speed of the blue object (at Town B) is 100 km/h. What is the distance between the two objects after 3 hours?

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