7.91 feet tall.
4.52 x 0.75= 3.39
3.39 + 4.52 = 7.91
713/9
79 2/9 Decimal form: 79.222
713 divided by 9 is 79 with a quotient estimate of 2.
79 r 2
Total = 21 feet
if each is 3 feet
21/3 = 7
Therefore, there are 7 sections
1. Angle DEF
2. Definition of congruent angles
3. The measure of angle GHI
For this we almost have the following equation:

We must match the equation to zero:

From here, we clear the value of t.
We have then:

We discard the negative root because we are looking for time:
Answer:
it will take him to reach the ground about:

seconds