Speed of the boat = u
speed of the current = v
in downstream,
u - v = 105/5
u - v = 21
in upstream
u + v = 105/7
u + v = 15
add both equations
2u = 36
u = 18
v = -3
so
speed of the boat = 18 km/h
speed of the current = 3 km/h
After solving we get y=0.24
Step-by-step explanation:
We need to solve the ratio: and find value of y
Solving:
Converting fractions into decimals
Ratio can be written as:
Now cross multiply
So, after solving we get y=0.24
Keywords: Ratio
Learn more about Ratios at:
#learnwithBrainly
Answer:[
−
2
,
∞
)
,
{
x
|
x
≥
−
2
}
Step-by-step explanation:
미안하지만 나는 영어를 잘 몰라, 너는 한국어로 설명해 줄 수 있니?