62.5/100 and 0.625 are both equivalent.
Answer: It will take
of an hour to complete the test.
Step-by-step explanation:
We need to convert the mixed number
to an improper fraction:

Now, we need to make the following add the fractions in order to calculate how many hours will it take to complete the test. Then, we get:

Therefore, it will take
of an hour to complete the test.
I believe the formula is lxwxh if so it's 20 x 30 x 4= 2400 i hope this helped