Answer:
[2(x+10)]°+(3x-30)°=180°[vertically opposite angle]
2x+20+3x-30=180°
5x-10=180°
5x=180-10
5x=170
x=170/5
x=34
Answer:

Step-by-step explanation:
From the question we are told that:
Angle 
Height of plane 
Generally the trigonometric equation for distance flown d is mathematically given by

Therefore


