Please help with Algebra 2 problem?

A ferry heading directly east is transporting tourists from one side of a river to the other side. The river flows from north to south. If the speed of the ferry in still water is 20 mph and the river is flowing at a speed of 6 mph, which is closest to the ferry's resultant speed as it crosses the river?

A. 14.0 mph
B. 19.1 mph
C. 26.0 mph
D. 20.9 mph

Question

Please help with Algebra 2 problem?

A ferry heading directly east is transporting tourists from one side of a river to the other side. The river flows from north to south. If the speed of the ferry in still water is 20 mph and the river is flowing at a speed of 6 mph, which is closest to the ferry's resultant speed as it crosses the river? 

A. 14.0 mph 
B. 19.1 mph 
C. 26.0 mph 
D. 20.9 mph

alekos · Answer

Just use pythagoras theorem on the two speeds to get the resultant