Answer:
the length of mountain = 123 mStep-by-step explanation:
In traingle ABC
angle BAC = 180-26 = 154° (linear pair)
Therefore angle ACB = 180 - (154+19) = 7°
Now, using sine rule
CA/sin19° = AB/sin7°
CA = (AB/sin7°) x sin19° = (105/0.1218) x 0.3255 = 280.6 m
So, CA = 280.6 m
Now, using sin26° = perpendicular/ hypotenuse
0.4383= length of mountain / CA
length of mountain = 0.4383 x CA = 0.4383 x 280.6 = 122.986 ≈ 123 m
Thus, the length of mountain = 123 m