Question

Hey ! Help me solving following question

Answer 1

Answer:

Step-by-step explanation:

given downstream traveled distance =75

upstream distance =75

and the speed in still water=20

now the time taken  for round trip=8hrs

time upstream+time downstream=round trip time

(75/(20-x))+(75/(20+x))=8

40/(400-x^2)=8/75

5*75=400-x^2

x^2=400-375

x=5