Question

See photo attached (NEED SOON)

Answer 1

Both triangles are congruent so

`\\ \bull\sf\longmapsto (x)/(4)=(9)/(12)`

`\\ \bull\sf\longmapsto 12x=36`

`\\ \bull\sf\longmapsto x=3`

Light source should be at 3m

Answer 2

• 3 m

Explanation:

The formed triangles are similar and the ratio of corresponding sides is equal:

• x/4 = 9/12
• x/4 = 3/4
• x = 3 m

The light source should be at 3 m height