Question

At noon, ship A is 30 nautical miles due west of ship B. Ship A is sailing west at 20 knots and ship B is sailing north at 17 knots. How fast (in knots) is the distance between the ships changing at 4 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)

Answer 1

The distance is \[\sqrt{(30+20t)^{2} + (17t)^{2}}\]

Answer 2

thank you got the answer 1678/sqrt(4181)

Answer 3

welcome