I don't know how to get the answer, but i know the answer is 127.50.
Answer:
4.5
Step-by-step explanation:
15% of 30 is 4.5
Square ABCD and square EFGH will reflect onto themselves across 8 lines of reflection
We can find the acceleration via
We have
Then by definition of average acceleration,
so that
We alternatively could have found the time without knowing the acceleration. Since acceleration is constant, the average velocity is
Then