Question
The power P needed to propel a boat is directly proportional to the cube of the speed of the boat. A 100 hp engine is needed to propel a boat at 15 knots. Find the power needed to drive the boat at 20 knots.
Answers
Anonymous
you are increasing speed by (20/15)
power= 100hp (20/15)^3
power= 100hp (20/15)^3