- #1

blade123

- 30

- 0

## Homework Statement

A plane flying with a constant speed of 300 km/h passes over a ground radar station at an altitude of 1 km and climbs at an angle of 30 degrees. At what rate is the distance from the plane to the radar station increasing a minute later?

## Homework Equations

a

^{2}+b

^{2}=c

^{2}

## The Attempt at a Solution

I got to (y+1)

^{2}+x

^{2}=d

_{2}

^{2}

It's that extra kilometer that's bothering me. It gives the answer as approx 296 km/h

d

_{1}is the distance between the starting and current point (5 km) and d

_{1}' is 300 km/h

I don't know how to get from d

_{1}to d

_{2}