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Let man’s rate upstream be x kmph. Then his rate downstream = 3x kmph. ∴Rate in still water =1/2 (3x+x)kmph=2x kmph ⇒32 = 2x⇒x = 16⇒3x=48 ∴ Rate of the stream =1/2 (48-16)kmph=16 kmph Alternate Method: Let U = speed of man in still water & V = speed of water So here N = time of upstream/ time of downstream = 3 So U/V = (N+1)/(N-1) = (3+1)/(3-1) = 4/2 =2 V = 32/2 = 16kmph
124, 143, 168, 202, 242, 289
21, 44, 78, 121, 179, 246
125, 142, 199, 320, 489, 778
99 124 160 209 273 355 454
132, 148, 196, 340, 762, 2068
17113 3853 1105 229 75
...11, 1341, 3070, 5267, 8011, 11386
31, 35, 62, 87, 430, 1761
15, 42, 56, 183, 219, 562
2, 6, 44, 462, 6930, 131670