Question

the speed of a motor boat going down a stream is 50.4 km/hr and going upstream is 23.3 km/hr . determine the speed of the boat in still water
and speed of the current​

Answer 1

Step-by-step explanation:

Let the speed of stream be X,

and the speed of boat be y.

So ,

according to the question

x+y=50.4

x-y=23.3

from both the equation we get

x-y=23.3

x=23.3+y

putting value of x

x+y=50.4

23.3+y+y=50.4

23.3+2y=50.4

2y=50.4-23.3

2y=27.1

y=27.1/2

y=13.55

therefore the value of y = speed of boat in still water is 13.55km/hr

and speed of stream is y+23.3

23.3+13.55

23.3+13.5

36.8

x=36.8 km/hr

Answer 2

Force is a push or a pull that changes or tends to change the state of rest or uniform motion of an object or changes the direction or shape of an object. It causes objects to accelerate.