The shadow on the wall is the tricky part. It runs vertically up the wall so the proportions of this part of the lamppost's shadow are not stretched.
Actually, its scale is the same as the posts next to the lamp or, indeed, any other vertical object.
UK Version
The shadow on the wall is the tricky bit. It runs vertically up the wall, so the proportions of this part of the lamp post's shadow are not stretched.
Actually, its scale is the same as the bollard next to the lamp post or, indeed, any other vertical object.
US Version
Think about a 2-meter post and how long its shadow would be. The 1-meter post casts a 1.5-meter-long shadow. Therefore, a post 2 meters tall would cast a shadow 3 meters long.
UK Version
Think about a 2 m high post and how long its shadow would be. The 1 m tall bollard casts a 1.5 m long shadow. Therefore, a 2 m post would cast a shadow 3 m long.
US Version
The post is 1 meter tall with a shadow 1.5 meters long (in other words, the shadow is half as long again). The part of the lamppost's shadow stretching from the foot of the post up to the wall is 3 meters, and so the part of the lamppost casting a shadow on the ground is 2 meters high.
UK Version
The bollard is 1 m tall with a shadow 1.5 m long (in other words, the shadows are one and a half times as long as the objects). The part of the lamp post's shadow stretching from the foot of the post up to the wall is 3 m, so the part of the lamp post casting a shadow on the ground is 2 m high.
US Version
Since we know from Hint 3 that the part of the shadow on the ground is cast by 2 meters of the lamppost, all we need to do now is add that to the 2 meters of shadow running up the wall.
UK Version
Since we know from Hint 3 that the part of the shadow on the ground is cast by 2 m of the lamp post, all we need to do now is to add that to the 2 m of shadow running up the wall.