Question 1196331
Let x   = the speed rate of the helicopter in mph
x + 360 = the speed rate of the jet in mph

Travel time is calculated as distance traveled divided by  speed rate

810/(x+30) = time traveled by jet

162/x = time traveled by helicopter

So we have the following equation:

810/(x+360) = 162/x
Solve for x
810(x) = 162(x+360)
810x = 162x + 58,320
810x - 162x = 58,320

648x = 58,320
x = 58,320/648
x = 90
x + 360 = 450 (speed of the jet

Answer:
The speed rate of the jet is 450 mph.

Solved.