Rakesh walking at the speed of 8 km/h crosses a bridge in 30 minutes. What is the length of the bridge in kilometres?
Given, Speed = 8 km/hr
Time = 30 min =Â $$\frac{30}{60}$$ hr =Â $$\frac{1}{2}$$ hr
$$\therefore\ $$Length of the bridge = Speed x Time =Â $$8\times\frac{1}{2}$$ = 4 km
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