Question

Bob can row 5 mph In still water. He rows directly across a river flowing at 6 mph. Using vectors, find his resultant

speed.

a. 7.81 mph
b. 3.32 mph
c. 11.00 mph
d. 7.14 mph

Answer 1

7.81mph

Explanation:

Using the pythagoras theorem;

resultant r is expressed as;

r² = 5² + 6²

r² = 25 + 36

r² = 61

r =√61

r = 7.81mph

Hence the resultant speed is 7.81mph