surely you can trace out the path of the ant on a piece of graph paper ...
(a) -10-20 = -30
(b) |-20-20| + |-10 - (-20)| = 40+10 = 50
it walked 40 left, then 10 right
an ant starts at x = 20cm on piece of graph paper and walk alogn the x axis to x = -20cm it then turns around and walks back to x = -10cm determine (a) the ants displacement and (b) the total distance treveled
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