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A boat goes 12 km downstream and comes back to the starting point in 3 hours. If the speed of the current is 3 km/ hr, then the speed (in km/ hr) of the boat in still water is1). 122). 93). 84). 6 |
Answer» Take option B So, downstream speed is 3+9=12And UPSTREAM speed is 9-3=6 To travel 12 km downstream it TAKES 1 hr And to travel 12 km upstream it takes 2 hr TOTAL time taken = 1+2 =3 hr to go and back.Hence option b is correct. |
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