Question

A motor boat covers the distance between the two localities on a river in 6 hours downstream and in 8 hours upstream. The speed of the boat is how many times that of the river?
please help me fast ...​

Answer 1

Answer:

33 km per hour .

Explanation:

Let the speed of th motorboat in still water be xkm/hr.

 

→Speed of the motorboat in downstream = x + 3

 

→Speed of the motorboat in upstream = x - 3

 

We know that,

Distance = Time × Speed

 

Distance is same.

 

→ 6(x - 3) = 5(x + 3)

→ 6x - 18 = 5x + 15

→  x = 33 

Therefore the speed of th motorboat in still water is 33km/hr.

hope this will help uh ....

have a great day ahead mate ....

❤❤❤

Answer 2

Answer:

7 times

Explanation:

Let the speed of boat=x

let speed of river=y

let total distance=s

we know soeed×time=distance

For upstream

(x-y)8=s-------(1)

For downstream

(x+y)6=s-------(2)

Dividing (1) and (2),we get

$(8x - 8y) \div (6x + 6y) = 1$

$8x - 8y = 6x + 6y$

$8x - 6x = 8y + 6y$

$2x = 14y$

$x = 7y$

therefore speed of boat is 7 times speed of river