In a potato race, 10 potatoes are placed in a straight line 5 meters apart, the
first potato being placed 6 meters from the starting point. How many meters does
a contestant travel in collecting the potatoes one at a time and placing them in
a basket located at the starting point ?
For the first potato he travels 6 meters up and 6 meters back,
so the first term of the sequence is 12.
For the second potato in addition to the 12 m, he travels 5 m
more up and 5 m more back, so that's 12+10 or 22 m. So the
common difference is 10 m.
We have an arithmetic sequence with , ,
Answer 570 meters
Edwin