A boat sailing through a river moved eastward for 5km, then cross river by moving 3km southward. On reaching the other side it moved westward through 1km and reached the jetty. Find the distance covered and displacement of the boat.
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Directions
N 5Km to east
W E 3Km to south
S 1Km to west
please go for the attachment
Distance = (5 + 3 + 1) Km
= 9 Km
Displacement = AD
In triangle ADE
AE 4Km
ED 3Km
Apply Pythagoras
AD² = AE² + ED²
AD = √ AE² + ED²
AD = √ 4² + 3²
AD = √16 + 9
AD = √ 25
AD = 5
AD = 5Km
Displacement = 5Km
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