Math, asked by narsingmohan9291, 1 year ago

A motorboat, whose speed is 24 km/h in still water, takes 1 hour more togo 32 km upstream than to return downstream to the same spot. Find thespeed of the stream.
Plz solve this

Answers

Answered by TheGJ
0
answer is 8 km/hr.
plss Mark as brainliest answer.
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Answered by VarshaS553
0

Let, the speed of the stream be x km/hr

Speed of boat in still water =20 km/hr

∴Speed of boat with downstream 20+x km/hr

∴ Speed of boat with upstream 20−x km/hr

As per given condition

20−x48−20+x48=1

⟹48[20−x1−20+x1]=1

⟹[(20−x)(20+x)20+x−20+x]=481

⟹400−x22x=481

⟹96x=400−x2

⟹x2+96x−400=0

⟹x2+100x−4x−400

⟹x(x+100)−4(x+100)=0

⟹(x−4)(x+100)=0

Either, x=4 or x=−100

∵ Speed cannot be negative ∴x=4 km/hr is considered.

∴ the speed of the stream =4 km/hr

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