calculate how long it will take a swimmer to swim a distance of 10 km against the current of a river which flows at 3 km / hr, given that he can swim in still water at 5 km / h	Choose the correct choice:  A) 3  B) 4  C) 5  D) 6  E) 7
<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<result>C</result>
calculate how long it will take a swimmer to swim a distance of 10 km against the current of a river which flows at 3 km / hr, given that he can swim in still water at 5 km / h
divide(10, subtract(5, 3))
"swim in still water at = 5 speed of river = 3 us = 5 - 3 = 2 distance = 10 t = 10 / 2 = 5 answer : c"