????????????????????? "the speed" ?????????????
WOT speed?????
maebee yu tri tu sae water in streem muev at 7 MPH?????
me thank yu tri tu sae boet go at a fixed speed relativ tu water
& then in SAME TIME go 720 with the water or 630 miles GINST water
then 1...(boet speed +water speed)*time=720
2... (boet speed -water speed)*time=630
1+2...2*(boet speed)=(720+630)=1350, so boet speed*time=1350/2=675 miles
1-2...2*(water speed)*time=720 -630=90, so water-speed*time=90/2=45
if yu tried tu sae water speed=7 mph, then time=45/7mph =6.4285714285714... ours
boet speed=675 mile/6.428571428...=105 mph
no boet kan go that fast