# Day trip

A group of tourists went on a day trip. For two hours they walked at a speed of 6 km/h, for another hour they climbed a steep hill at a speed of 2 km/h, spent an hour and a half at lunch, then in an hour they inspected the castle garden at a free step at a speed of 1 m/s and finally for three hours they returned home at speed 4. km/h.
a) Calculate the total time tourists spent on the trip.
b) Calculate their average speed.

t =  8.5 h
v =  3.4824 km/h

### Step-by-step explanation:

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