a man can row 8 kmph in still water and the river, Problems On Boats & Streams, General Mathematics

Question:A man can row 8 kmph in still water and the river is running at 2 kmph. If the man takes 1 hour to row to a place and back, how far is the place ?

Answer Man's rate downstream = (8 + 2) kmph = 10 kmph.

Man's rate upstream = (8 - 2) kmph = 6 kmpn

Let the required distance be x km

Then,` x/10 + x/6 = 1 <=> 3x + 5x = 30 <=> x`

        `= 3.75` km

Hence, the required distance is 3.75 km.

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A man can row 8 kmph in still water and the river is running at 2 kmph. If the man takes 1 hour to row to a place and back, how far is the place ?

Question:A man can row 8 kmph in still water and the river is running at 2 kmph. If the man takes 1 hour to row to a place and back, how far is the place ?

Answer Man's rate downstream = (8 + 2) kmph = 10 kmph. Man's rate upstream = (8 - 2) kmph = 6 kmpn Let the required distance be x km Then,` x/10 + x/6 = 1 <=> 3x + 5x = 30 <=> x` `= 3.75` km Hence, the required distance is 3.75 km.