An empty truck weighs 2000 kg. After the truck was loaded, freight made up 80% of the weight of the loaded truck. At the first stop one fourth of the freight was unloaded. What percent of the loaded truck's weight did the load make up after that? (Hint: freight = load.)

A) 20%
B) 25%
C) 55%
D) 60%
E) 75%

Let's calculate the weight of the loaded truck first.

The empty truck weighs 2000 kg.

Freight makes up 80% of the weight of the loaded truck, so the freight weighs 80% * 2000 kg = 1600 kg.

The total weight of the loaded truck is the sum of the weight of the freight and the weight of the empty truck, so the loaded truck weighs 2000 kg + 1600 kg = 3600 kg.

At the first stop, one fourth of the freight is unloaded. One-fourth of 1600 kg is (1/4) * 1600 kg = 400 kg.

The remaining weight of the freight after unloading is 1600 kg - 400 kg = 1200 kg.

The total weight of the loaded truck after unloading is 2000 kg (weight of the empty truck) + 1200 kg (weight of the remaining freight) = 3200 kg.

The load now makes up 3200 kg (weight of the loaded truck after unloading) / 3600 kg (weight of the loaded truck before unloading) * 100% = 88.89%.

Therefore, the percent of the loaded truck's weight that the load makes up after unloading is approximately 88.89%.

But our answer choices are in whole-number percents, so we need to round our answer.

The closest whole-number percent to 88.89% is 90%.

Therefore, the correct answer is not listed among the available options.

To solve this problem, we need to calculate the weight of the loaded truck after the first stop and then determine what percent of the weight that the remaining load makes up.

First, we need to find out how much the freight weighs. We're given that the freight makes up 80% of the weight of the loaded truck. So, we need to find 80% of the total weight of the loaded truck.

Weight of the loaded truck = 2000 kg
Weight of the freight = 80% of 2000 kg = 0.8 * 2000 kg = 1600 kg

Next, we need to determine how much freight was unloaded at the first stop. We're given that one fourth of the freight was unloaded, so we need to find one-fourth of 1600 kg.

Weight of unloaded freight = 1/4 * 1600 kg = 400 kg

Now we can find the weight of the loaded truck after the first stop by subtracting the weight of the unloaded freight from the original weight of the loaded truck.

Weight of the loaded truck after the first stop = Weight of the loaded truck - Weight of unloaded freight
Weight of the loaded truck after the first stop = 2000 kg - 400 kg
Weight of the loaded truck after the first stop = 1600 kg

Finally, we need to determine what percent of the loaded truck's weight the load makes up after the first stop. The remaining load is still 1600 kg (after unloading 400 kg), so we need to calculate what percent 1600 kg is of the remaining weight.

Percent of the loaded truck's weight that the load makes up = (Weight of the remaining load / Weight of the loaded truck after the first stop) * 100%
Percent of the loaded truck's weight that the load makes up = (1600 kg / 1600 kg) * 100%
Percent of the loaded truck's weight that the load makes up = 100%

Therefore, the answer is 100%, which means the load still makes up the same percentage of the loaded truck's weight after the first stop.