Question

A motor boat whose speed is 18 km/h still in water take 1 hour more to go 24 km upstream
than to return downstream to the same spot. Find the speed of the stream.​

Answer 1

Answer:

It takes 1 hour to travel upstream & return to same spot,. From this information we can say that, ⇒ The speed of motor boat (boat's engine) = 18 kmph , ⇒ It traveled 24 km upstream & 24km downstream in 1 hour,

Step-by-step explanation:

plz mark as brainliest

Answer 2

Answer:

Speed of boat in still water = 18km/hr

Let speed of the stream = s

Speed of boat upstream = Speed of boat in still water - speed of stream = 18−s

Speed of boat down stream = Speed of boat in still water + speed of stream = 18+s

Time taken for upstream = Time taken to cover downstream + 1

⇒

Speed

upstream

Distance

upstream

=

Speed

downstream

Distance

downstream

+1

⇒

18−s

24

=

18+s

24

+1

⇒24(18+s)=24(18−s)+(18−s)(18+s)

⇒s

2

+48s−324=0

⇒s

2

+54s−6s−324=0

⇒(s+54)(s−6)=0

⇒s=6,−54

⇒s



=−54

Thus, s=6km/hr, Speed of steam cannot be negative.