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| Question: Speed of boat in still water is 10kmph.If it travels 24km downstream,16km upstream in the same amount of time, what is the speed of the stream? (a)3kmph (b)3.5kmph (c)2kmph
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| September 09, 2008 06:45:47 |
#4 |
| m_manic |
Member Since: September 2008 Total Comments: 36 |
RE: Speed of boat in still water is 10kmph.If it travels 24km downstream,16km upstream in the same amount of time, what is the speed of the stream?(a)3kmph(b)3.5kmph(c)2kmph
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Speed in still water = 10 kmph
stream speed = x kmph
down stream speed = 10 + x
upstream speed = 10 - x
24 / (10 + x ) = 16 / (10 - x )
240 - 24 x = 160 + 16 x
80 = 40 x
x = 2 kmph |
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