Question

A boat needs to travel south at speed of 20km/h. A constant current of 6km/h is flowing from the south-east. Find the resultant speed of the boat?

Answer 1

15.76 km/h.

Explanation:

Th current is flowing against the flow of the boat.

Resultant speed of the boat = 20 - the resultant speed of the current in the north direction

= 20 - 6 cos45

= 15.76 km/h.

Answer 2

26km/hr twenty six kilometres per hour