Question

The speed of a boat when travelling downstream is 32 km/hr, whereas when travelling upstream it is 28 km/hr. what is the speed of the boat in still water

Answer 1

Hi Mate !!


Let the speed of Boat be x
and that of stream be y

• Speed in Upstream = ( Speed of boat - Speed of steam )


28 = x - y ...... ( i )


• Speed in Downstream = ( Speed of boat + speed of Stream )

32 = x + y ..... ( ii )

Adding ( i ) and ( ii )

x - y + x + y = 28 + 32

2x = 60

x = 60/2

x = 30

Putting value of x in ( i )

28 = x - y

28 = 30 - y

28 - 30 = - y

- 2 = - y

2 = y


So, the speed of Boat is ( x ) :- 30km/hr
speed of Stream is ( y ) :- 2km/hr

Answer 2

Answer:

Explanation: Here is the formula=Speed in still water=upstream speed+downstream speed/2

so, 28+32×1/2=30km/hr