Answer:6
Step-by-step explanation:
Do (10 x 10) then (10 x 20), and then add your two answers together.
Its simple :)
Im not sure tho sorry for your inconvenience
This isn't really mathematics but I can give you an answer.
Assuming, it's in the dark (cuz in the light, why would you use flash), a person in the photograph can gain a red-eye (in the photo).
The only one I can think of is red eye.
