Question

Pls solve it...
It's of 25 points.... ​

Answer 1

Answer:

Step-by-step explanation:

Let the distance between the two ports be x km. 

Then, speed downstream = x/4 

And speed upstream = x/5 

Speed of the stream, 

= [speed downstream - speed upstream] / 2

= (x/4 - x/5)/2

Or, (5x -4x)/40 = 2

Or, x/40 = 2 

Thus, x = 80 km.

Distance between two ports = 80 km.

Answer 2

Answer:

let deepa = x

therefore mother= 3x+4

six years from now,

(x+6)2+8=3x+6+4

2x+20=3x+10

thus,

x=10 years mother =30+4