Respuesta :
Answer:
10 km/h
Step-by-step explanation:
It is given that a man's speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr.
Man's speed with the current (Downstream) = 15 km/hr
Speed of the current = 2.5 km/hr
We need to find the man's speed against the current(Upstream).
Let x be the Man's speed against the current.
Speed of the current [tex]=\frac{Downstream-Upstream}{2}[/tex]
[tex]2.5=\frac{15-x}{2}[/tex]
Multiply both sides by 2.
[tex]5=15-x[/tex]
[tex]x=15-5[/tex]
[tex]x=10[/tex]
Therefore, the man's speed against the current is 10 km/hr.
