Question Number 196780 by Tawa11 last updated on 31/Aug/23
A tugboat is travelling from Asaba to Onitsha across the River Niger with a resultant velocity of 20 knots. If the river flows at 12 knots, the direction of motion of the boat relative to the direction of water flow is?
Commented by mr W last updated on 31/Aug/23
Commented by mr W last updated on 31/Aug/23
$$\mathrm{121}° \\ $$$${not}\:{clear}? \\ $$
Commented by Tawa11 last updated on 31/Aug/23
$$\mathrm{This}\:\mathrm{is}\:\mathrm{very}\:\mathrm{clear}\:\mathrm{too}\:\mathrm{with}\:\mathrm{the}\:\mathrm{diagram}. \\ $$$$\mathrm{God}\:\mathrm{bless}\:\mathrm{you}\:\mathrm{sir}. \\ $$
Commented by mr W last updated on 31/Aug/23
$${but}\:{it}\:{should}\:{also}\:{be}\:{clear}\:{without}\:{the} \\ $$$${diagram},\:{because}\:{the}\:{diagram}\:{didn}'{t} \\ $$$${come}\:{with}\:{the}\:{question},\:{it}\:{must}\:{be} \\ $$$${drawn}\:{by}\:{yourself}. \\ $$
Commented by Tawa11 last updated on 31/Aug/23
$$\mathrm{That}\:\mathrm{is}\:\mathrm{the}\:\mathrm{problem}. \\ $$$$\mathrm{I}\:\mathrm{drew}\:\mathrm{wrong}\:\mathrm{diagram}\:\mathrm{but}\:\mathrm{I}\:\mathrm{doubt}. \\ $$$$\mathrm{Immediately}\:\mathrm{I}\:\mathrm{saw}\:\mathrm{your}\:\mathrm{diagrams}.\:\mathrm{I} \\ $$$$\mathrm{understand}. \\ $$$$ \\ $$$$\mathrm{My}\:\mathrm{textbook}\:\mathrm{wrong}\:\mathrm{too}. \\ $$
Commented by Tawa11 last updated on 31/Aug/23
Commented by Tawa11 last updated on 31/Aug/23
$$\mathrm{Sir}\:\mathrm{see}\:\mathrm{the}\:\mathrm{solution}\:\mathrm{provided}\:\mathrm{in}\:\mathrm{the}\:\mathrm{text}. \\ $$
Commented by Tawa11 last updated on 31/Aug/23
$$\mathrm{My}\:\mathrm{mind}\:\mathrm{tell}\:\mathrm{me}\:\mathrm{it}\:\mathrm{wrong}. \\ $$$$\mathrm{That}\:\mathrm{is}\:\mathrm{why}\:\mathrm{I}\:\mathrm{asked}. \\ $$$$\mathrm{But}\:\mathrm{when}\:\mathrm{I}\:\mathrm{saw}\:\mathrm{your}\:\mathrm{diagram}.\:\mathrm{I}\:\mathrm{underdtand}\:\mathrm{better}\:\mathrm{and}\:\mathrm{cleared}. \\ $$
Commented by mr W last updated on 01/Sep/23
$${also}\:{here}\:{you}\:{can}\:{not}\:{simply}\:{say}\:{that}\:{the}\: \\ $$$${solution}\:{is}\:{wrong}.\:{it}\:{depends}\:{on}\:{how} \\ $$$${you}\:{understand}\:“{cross}\:{the}\:{river}''\:{and} \\ $$$$“{direction}\:{of}\:{motion}\:{of}\:{boot}''.\: \\ $$$${sometimes}\:{the}\:{language}\:{is}\:{just}\:{not} \\ $$$${precise}\:{in}\:{mathematical}\:{sense}.\:{you} \\ $$$${should}\:{have}\:{your}\:{own}\:{opinion}. \\ $$
Commented by Tawa11 last updated on 01/Sep/23
$$\mathrm{I}\:\mathrm{really}\:\mathrm{appreciate}\:\mathrm{your}\:\mathrm{time}\:\mathrm{sir}. \\ $$