. A boat travels 30 km upstream in a river in the same period of time as it takes to travel 50 km
downstream If the rate of stream bo 5 kmph, find the speed of the boat in still water..
The length of each of the equal sides of an inceles triangle is 4 cm longer than the base. If the
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Let the speed of boat be (x−5) in upstream and (x+5) in downstream
s=td or t=sd
⇒530=6hours and 550 = 10hours
then the equation will be 6(x+5)=10(x−5)
6x+30=10x−50
⇒10x−6x = 30+50
⇒4x = 80
⇒x= 480
⇒x= 20
speed of the boat in still water is 20kmph.
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