question_answer

A boat is moving with a velocity \[3\text{ }\hat{i}+4\text{ \hat{j}}\] with respect to ground. The water in the river is moving with a velocity \[-3\text{ }\hat{i}-4\text{ \hat{j}}\] with respect to ground. The relative velocity of the boat with respect to water is

A) \[8\hat{j}\]        

B)                    \[-6\hat{i}-8\hat{j}\]

C) \[6\hat{i}+8\hat{j}\]     

D)        \[5\sqrt{2}\]