A student walks 30 feet to the right. Then walks 10 feet to the left. Then walks 20 feet to the right. It took 20 seconds to do all of this. What was the students speed?

average speed of the person is 3 feet/s

Explanation:

As we know that the average speed of the person is ratio of total distance and total time interval

so here we know that total distance moved by the person is given as

so we have

so here we have

at right angles to each other