Easy physics question ? help?

Question

How does the thickness of paint sprayed on a

surface change when the sprayer is held twice

as far away?

1. drops to one quater of the original value

2. doubles

3. remains the same

4. more information is needed to answer the

question

5. quadruples

6. halves

can someone help me ? i initially thought it was 4 but it was wrong.

Answer 1

you were on the right track...when you move the can twice as far away, the spray can cover 2^2 or 4 times more area, so the thickness becomes 1/4 of what it was when the spray can was half as far from the wall