Question

the car makes a displacement of 100 m towards east and then 200 m towards north .Find the magnitude and direction of resultant

Answer 1

R= (100*100 +200*200)1/2
=(10000+40000)1/2
=50000*1/2
=100(5)½
the direction is North east

Answer 2

Hi Dear 
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R=√ A²+B²+2ABcos∅
R=√100²+200² + 0 ( As, cos 90°= 0 )
R= √10000+20000
R=√30000
R=√3x10000
R=100√3m to the North East