a boat sailing through a river moved eastward for 5km then cross the river by moving 3 km southward. on reaching the other side it moved westward through 1 km and reached jetty. find the distance and displacement
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Directions
N 5Km to east
W E 3Km to south
S 1Km to west
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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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