A person travelling in a straight line moves with a constant velocity v1 for certain distance ‘x’ and with a constant velocity v2 for next equal distance. The average velocity v is given by the relation
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a
v=v1v2
b
1v=1v1+1v2
c
2v=1v1+1v2
d
v2=v1+v22
answer is C.
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Detailed Solution
As t1=xv1 and t2=xv2∴ v=x+xt1+t2=2xxv1+xv2=2v1v2v1+v2∴ 2v=1v1+1v2