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
The answer is going to be D
Answer: gjnyujhgfdrjhg;flhigobkhyjnhkmk,
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Answer:
im not sure but i got 30.1
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Answer:6/4
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