hint : AD is hypotenuse
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Distance covered = 7m + 5m + 8m= 20m
Displacement =
By Pythagoras theorem
(AD)^2=(AE)^2 + (ED)^2
(AD)^2= (15)^2 + (5)^2
AD^2= 225 + 25
AD = /250 = 5 root 10
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