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at a distance of 4000ft from the launch site a spectator is observing a rocket being launched if the rocket lifts off virtically and is rising at a speed of 600ft/s when it is at an altitiude 3000ft,the distance between the rocket and the spectator changing at that instant at the rate :

at a distance of 4000ft from the launch site a spectator is observing a rocket being launched if the rocket lifts off virtically and is rising at a speed of 600ft/s when it is at an altitiude 3000ft,the distance between the rocket and the spectator changing at that instant at the rate :

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Grade:6

1 Answers

Bhaskar bhadani
21 Points
4 years ago
By applying Pythagoras theoremLet`s assume that rocket is at Y ft. Above ground and dist. from observer is X.Then,X^2=Y^2+5000Diff. it2xdx/dt=2ydy/dt+0Basically you have to find dx/dtTherefore,Putting x=5000ft.,Y=3000ft.&dy/dt=600ft/sYou will get dx/dt=360ft/s

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