A man's speed with the current is 18 km/hr and the speed of the current is 2.5 km/hr. The man's speed against the current is?  Choose one.
A) 10
B) 18
C) 50
D) 30
E) 40
Man's speed with the current = 18 km/hr   =&gt; speed of the man + speed of the current = 18 km/hr   speed of the current is 2.5 km/hr   Hence, speed of the man = 18 - 2.5 = 20.5 km/hr   man's speed against the current = speed of the man - speed of the current   = 20.5 - 2.5= 
<gadget id="calculator">20.5 - 2.5</gadget>
<output>18</output>
18 km/hr   Answer is 18.
<result>B</result>
A man's speed with the current is 18 km/hr and the speed of the current is 2.5 km/hr. The man's speed against the current is?