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  1. A bus covers a distance of 400 km with a speed of 20 km/h. What time is taken by the bus to cover this distance?
    1. 25 h
    2. 5 h
    3. 21 h
    4. 20 h
Correct Option: D

We know that, speed = Distance / Time
∴ Required Time = Distance / Speed = 400/20 = 20 h


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