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X ,y and z are speeds of bikes respectively
D/Z - D/Y=D/Y -D/X
2/Y =1/x+1/z---(1)
(240+80)/x=(240-60)/Y +1
1/x -1/240=1/y---(2)
Putting 1/y in (1)
1/x=1/z +1/120---(3)
320/z=160/x
X=2z putting in (3)
X=60
Z=120
Difference=120-60=60

Forwarded from Deleted Account
X ,y and z are speeds of bikes respectively
D/Z - D/Y=D/Y -D/X
2/Y =1/x+1/z---(1)
(240+80)/x=(240-60)/Y +1
1/x -1/240=1/y---(2)
Putting 1/y in (1)
1/x=1/z +1/120---(3)
320/z=160/x
X=2z putting in (3)
X=60
Z=120
Difference=120-60=60


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