Question

Aboat goes downstream and covers the distance between two ports in 5 hours while it covers the same distance upstream in 5.5 hours. find the speed of boat in still water if the speed of stream is 1.5 km/hr​

Answer 1

Answer:

=> S=18 km/hr.

Step-by-step explanation:

Let the distance between two port be  

′

x  

′

 km.

And speed of boat in still water be  

′

S  

′

 km/hr.

According to question,

In downstream,

x=(S+2)x4   ........(1)                               as,  (Distance= Speed x Time)

Similarly,

In upstream,

x=(S−2)x5   ........(2)  

From (1)  & (2),

(S+2)4=(S−2)5

=> 4S+8=5S−10

=> S=18 km/hr.

Dear bro/sis i am taking free online tuition classes for classes 1 - 7 if intrested mail me

[email protected]