speed of a boat in still water is 16 km/h. if it can travel 20 km downstream in the same time as it can travel 12 km upstream, the rate of stream is.
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v= 16 km /hr speed of boat in still water
u=? speed of stream
Downstream, formula, v+U= 20/t
upstream formula, v-u =12/t
so solve
v+U / v-u= 20/12
but from above
16+u/16-u= 20/12
16+u/16-u= 5/3
48+3u= 80-5u
8u = 32
U= 4 km/hr
so, speed of stream be, 4 km/hr
u=? speed of stream
Downstream, formula, v+U= 20/t
upstream formula, v-u =12/t
so solve
v+U / v-u= 20/12
but from above
16+u/16-u= 20/12
16+u/16-u= 5/3
48+3u= 80-5u
8u = 32
U= 4 km/hr
so, speed of stream be, 4 km/hr
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