Question

svsbhsjsjsjsjsjsjsjsjdjdjsjsjsjsjjsbdbf fvvfbfbf

Answer 1

Let the speed of the boat be x
and the speed of the stream be y.
speed while upstream=x-y
speed while downstream=x+y
therefore,
16/x-y + 24/x+y =6 hrs
36/x-y + 48/x+y =13 hrs
let 1/x+y be B and 1/x-y be A
16A+24B=6
8A+12B=3

36A+48B=13
A=1/4
B=1/12
x-y=4
x+y=12
x=8 km /hr
y=4Km/hr