Question

plz solve it as fast as u can​

Answer 1

d=15km t=3hrs 45 min

therefore time in hrs =3+45÷60 =15by 4

speed =distance by time that is 4km per hrs

speed in still water =9km per hrs

therefore, speed of stream is 9km per hrs -5 km per hrs =4 km per hrs

I hope that it is correct