Final answer:
Angela will take a total of 60 minutes, or 1 hour, to finish building the wall around her garden, since she has completed 75% of the work in 45 minutes.
Step-by-step explanation:
If Angela has completed 75% of building the wall in 45 minutes, we need to determine the total time it will take her to finish 100% of the work. Since 75% is equivalent to three-quarters, that means if 45 minutes represent 75% of the time needed, then one-quarter (25%) of the time would be one third of 45 minutes. Angela will take a total of 60 minutes, or 1 hour, to finish building the wall around her garden, since she has completed 75% of the work in 45 minutes.
To find one-quarter of the time, we divide 45 minutes by 3.
45 minutes ÷ 3 = 15 minutes
Now, we know that 15 minutes is 25% of the total time needed to build the wall. To find the total time, which is 100%, we multiply the 15 minutes by 4.
15 minutes × 4 = 60 minutes
Therefore, the total time Angela will take to build the wall around her garden is 60 minutes, which is equivalent to 1 hour.