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  1. The speed of a boat in still water is 15 km/hr and the rate of current is 3 km/hr. The distance travelled downstream in 12 minute is ?
    1. 3.6 km
    2. 2.4 km
    3. 1.2 km
    4. 1.8 km
Correct Option: A

Downstream speed = 15 + 3 = 18 km/hr.
Required distance = (18 x 12)/60 = 3.6 km


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