A man can roll at 6kmhr-1 in still water and wants to cross a river to a position exactly opposite his starting point. If the river is 5km wide and is flowing at 4kmhr-1 eastwards. find by scale drawing or otherwise the direction in which he must set off in order to accomplish his objective. How long will it take to cross the river .

My sister brought this home as assignment

Lalasticla
Seun
Please front page I need to give her the answer tomorrow

1. A man can roll at 6kmhr-1 in still water and wants to cross a river to a position exactly opposite his starting point. If the river is 5km wide and is flowing at 4kmhr-1 eastwards. find by scale drawing or otherwise the direction in which he must set off in order to accomplish his objective. How long will it take to cross the river .

My sister brought this home as assignment

Lalasticla
Seun
olawalebabs
Richiez
Fynestboi

Please front page I need to give her the answer tomorrow

tel ha d question is nt correct....ftc

The water was still and at the same time flowing at a certain velocity? This is equivocal na. However, this question is basically about Distance-Time graphs, but it's somewhat tough. Let me try something.

Using parallelogram law of vector. The relative velocity of the man to the river can be calculatednusing pythagoras theorem.

√(6^2 + 4^2)= 7.2kmhr-1
While the direction is given as tan-1 6/4 = 56.3 degree



The time taken woukd be= distance of the river 5km/ relative speed of the man to the river which is 7.2kmhr-1=

0.694 hours



I stand to be corrected though.