Question

A boat moves upstream with 12 km/hr and downstream with 16 km/hr. what is the speed of current and speed of boat in still water?

Answer 1

speed of still water = 1/2(28)
= 14 m/s
speed if current stream = 1/2(4)
=2m/s

Answer 2

Answer:

The speed of the boat is 14 km.

Speed of the current is 26 km.

Step-by-step explanation:

Given : A boat moves upstream with 12 km/hr and downstream with 16 km/hr.

To find : What is the speed of current and speed of boat in still water?

Solution :

Let the speed of boat = x

Speed of current = y

Speed of boat in upstream = x-y

Speed of boat in downstream = x+y

According to question,

$x-y=12$ .....(1)

$x+y=16$ .....(2)

Add equation (1) and (2),

$x-y+x+y=12+16$

$2x=28$

$x=14$

Substitute in equation (1)

$14-y=12$

$y=12+14$

$y=26$

The speed of the boat is 14 km.

Speed of the current is 26 km.