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Option 2 : 3.5
Given:-
Speed of bike 1 = 44 km/hr
Speed of bike 2 = 53 km/hr
Distance = 339.5 km
Formula:-
Distance = speed × time
Speed of bike with wind = b + w
Speed of bike against wind = b – w
Calculation:-
Bike speed 1 = 44 – w
Bike speed 2 = 53 + w
Time required = 339.5/(44 – w + 53 + w) = 3.5 hours.
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