I try to take a step by step instructions on how to solve this problem?

A young bride and her procession is to have her daughter last trip together before the big day. The women will travel from Memphis, TN Las Vegas, NV. And flight will stop in Oklahoma City OK, and El Paso, Texas to pick up other friends along the road. The aircraft ground speed is 380 km / hour from Memphis to Oklahoma City then to 310 km / hour from Oklahoma City to Las Vegas. What going to the ladies of flight?

This problem has a lot of missing information. What is the distance between the states? Its more than 380 km or 310 km.

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