A boy in a canoe paddles upriver at a speed of 1.4 m/s relative to the water. The water flows downriver at a speed of 1.4 m/s relative to the riverbed. How fast does the boy's canoe appear to move when viewed by an observer standing on the riverbank? A:0 m/s

B:1.4 m/s up the river

C: 1.4 m/s down the river

D: 2.8 m/s up the river

I want this solved in 5 minutes pl

sonar - device which is used to find the submit submarines, sankalp ship. sonar waves consists of a transmitter and detector which are installed in the observation centre on board of a ship. the ultrasonic waves are sent into the sea at high frequency about 1000 khz in all direction.

and 1and 1

truck y has a greater velocity than truck x.

1 is a answer of a question