Answers

2014-04-21T09:37:18+05:30
The angle covered by man is 10/15 rad
1 rad=180/pi degrees
10/15 rad=(180/pi)*(10/15) degrees=38.197 degrees
Now displacement is given by cosine law
let l be displacement
l^2=2r^2-2r^2cos(38.197)=2(100)(1-cos(38.197))=42.823
l=6.5434 cm
is the displacement
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2014-04-21T15:05:27+05:30
Angle Covered man = 10/15
rad 1 rad = 180/pi degrees
10/15 rad =(180/pi)*(10/15) degrees=38.197 degrees
Now displacement is given by cosine law
let l be displacement l^2=2r^2-2r^2cos
(38.197)=2(100)(1-cos(38.197))=42.823

displacement = l=6.5434 cm 
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