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Speed of boat in still water is two times more than speed of current, if boat travels 60 km downstream and 48 km upstream in 13 hours. find how much time will be required to boat in covering 84 km downstream and 36km upstream?
(a)
13 hours
(b)
10 hours
(c)
8 hours
(d)
12 hours
(e)
14 hours

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Important Questions on Ratio and Proportion
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G is twice as fast as S in doing work. If G can do a work in days less than S, how many days will they take to complete the work together?
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Ten people can do a work in days. In how many days, can 15 people complete double the work -
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HARD

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HARD

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A and B working alone can do a work in days and days respectively. They started the work together but B left after sometime and A finished the remaining work in days. Find after how many days from start B left the work?

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