Question

plz ans... ASAP.... TOMORROW IS MY EXAMM!!!WISH ME ALL THE BEST ALSOO!! ​

Answer 1

Answer:

Let us suppose

Speed of the stream = x km/hr

Speed of the boat in still water = 11 km/hr

Speed of the boat downstream = (11 + x) km/hr

Speed of the boat upstream = (11 - x) km/hr

According to the assumption :-

12/(11+x) + 12/(11-x) = 2(45/60)

(12*22) / (121-x²) = 11/4

121-x² = 96

x² = 25

x = 5

Step-by-step explanation:

Speed of stream :- 5km/hr

Hope this helps