5. A boat goes downstream and covers the distance between two ports in 96 minutes , while
it covers the same distance in upstream in 120 minutes. If the speed of stream is 1km/hr.
Find the speed of boat in still water?
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Let speed of boat be X kmph.
down stream- in 96 minute boat will travel 96/60(X+1)km
upstream -in 120 min boat will travel 120/60(X-1)km
As per question 96/60(X+1)=120/60(X-1)
⇒96 X+96=120X-120
⇒ 24X= 216
X=9
Speed of boat 9 kmph
down stream- in 96 minute boat will travel 96/60(X+1)km
upstream -in 120 min boat will travel 120/60(X-1)km
As per question 96/60(X+1)=120/60(X-1)
⇒96 X+96=120X-120
⇒ 24X= 216
X=9
Speed of boat 9 kmph
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