Final answer:
The height of the jet is 4 meters.
Step-by-step explanation:
To solve this problem, we can use similar triangles. The height of the airplane hangar and the length of its shadow form one pair of corresponding sides, while the height of the jet and the length of its shadow form the other pair. Since the ratio of corresponding sides in similar triangles is equal, we can set up the following proportion:
12m / 18m = x / 6m
Cross-multiplying, we get:
18x = 72
Dividing both sides by 18, we find that x = 4m.
Therefore, the height of the jet is 4 meters.