Question

from port A a streamer goes upstream and reaches port BIn 5 hours. the same distance is covered downstream in 4hr if the speed of the streamer is 3km per hr find the speed of the streamer in still water​

Answer 1

Answer:

Step-by-step explanation:Let 'x' be the speed of the streamer in still water.

Distance in both cases is same (Suppose it as d).  We know, speed=distance/time.      So when downstream,

x + 2 = d/4

=> d = 4x + 8.  When upstream,

x - 2 = d/5

=> d = 5x - 10.  Since, d is same

=>4x + 8 = 5x - 10

=> 5x - 4x = 10+8

=> x = 18.

Hence, speed of the streamer in still water is 18 kmph.