A motor boat goes downstream and covers a distance in 4 hours wallet wallet covers the same distance aap streams in 5 hours. if the speed of stream is 3 km/hr, find the speed of a motor boat in still water.
Answers
Answered by
1
Answer:
Let the speed of the motorboat be X.
speed of motorboat in downstream=x+3
speed of motorboat in downstream=x-3
since,distance=time x speed
therefore,
distance travelled by speed of X+3=4(X+3)
distance travelled by speed of x+-3=5(x-3)
since distance travelled was same, so
4(X+3)=5(x-3)
4x+12=5x-15
4x-5x=-15-12
-x=-27
X=27
therefore, the speed of motorboat is 27 km/hr
Answered by
1
Let the speed of the motorboat be X.
speed of motorboat in downstream=x+3
speed of motorboat in downstream=x-3
since,distance=time x speed
therefore,
distance travelled by speed of X+3=4(X+3)
distance travelled by speed of x+-3=5(x-3)
since distance travelled was same, so
4(X+3)=5(x-3)
4x+12=5x-15
4x-5x=-15-12
-x=-27
X=27
therefore, the speed of motorboat is 27 km/hr
Similar questions