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Bids777
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The ABC Reservoir on Clear River is used to prevent flooding in downst 04 May 2026, 11:39
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For the second section and the first question, I doubted a second because of this part

"Whenever possible, the engineers are expected to keep the reservoir depth within a certain 23 meter allowable range - high enough to support recreational activities and not above the reservoir's maximum allowable depth"

HarshavardhanR
­Q2
Given Model Predictions:
Current Depth: 217m
By Next Day: 217 + 1 = 218m
Next Two days: 218m (will remain at this depth)

Question: For each of the statements, say "Yes" if it is true. Else, "No".

S1 -> The predictions indicate that the reservoir's depth will be sufficient for recreational activities.

The constraint for depth is 195m to 218m. As long as the depth stays in this range, the depth is OK for recreational activities. In all these days, depth is 217 to 218m, sufficient for recreational activities. YES.

S2 -> The predictions indicate that the reservoir will reach its maximum allowable depth.

The upper limit is 218m. Clearly, as per the predictions, the maximum allowable depth (218m) is being reached. YES.

S3 -> The predictions indicate that the reservoir will exceed its maximum depth.

These predictions indicate that the depth will reach 218m but not anything more. It is reaching the maximum depth but not exceeding it. NO.

Q3
Question: Given the data from the model (Day 1 to Day 7), on which day (among the options) was average outflow greater than average inflow?

Let's think about this -> What would happen if, on a certain day, outflow rate was lesser than inflow rate?

On that day -> More water would be coming in than going out. Thus the depth of water would see an increase from previous day's measurement.

Similarly, What would happen if, on a certain day, outflow rate was more than inflow rate?

On that day -> More water would be going out than coming in. Thus the depth of water would see a decrease from previous day's measurement.

We need to find on what day the outflow is more than inflow. That would be the day(s) when we see a reduction in the water level.

Now, look at the graph.
- On Day 2, we see an increase in depth from day 1. This means that inflow>outflow.
- On Day 3, we see an increase in depth from day 2. This means that inflow>outflow.
- On Day 4, we see an increase in depth from day 3. This means that inflow>outflow.
- On Day 5, we see a decrease in depth from Day 4. This means that outflow>inflow.
- On Day 6, we see a decrease in depth from Day 5. This means that outflow>inflow.
- On Day 7, we see an increase in depth from Day 6. This means that inflow>outflow.

Day 5 and Day 6 are both valid answers. We say Day 5 as a choice. It is the correct answer.

___
Harsha

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