a boatman selling a boat along river flow.if he sell boat in steal water at 3m/sec and flow of river is 2m/sec.how much time he will take to sell 100m.
Choose the correct answer: A) 30 B) 10 C) 15 D) 20 E) 25
net speed = 3+2= 
<gadget id="calculator">3+2</gadget>
<output>5</output>
5 m/sec   distance= 100m   time=100/5= 
<gadget id="calculator">100/5</gadget>
<output>20</output>
20sec   answer 20
<result>D</result>
a boatman selling a boat along river flow.if he sell boat in steal water at 3m/sec and flow of river is 2m/sec.how much time he will take to sell 100m.