## Math Problem Statement

## Solution

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## Math Problem Analysis

### Mathematical Concepts

Algebra

Linear Equations

Time, Speed, and Distance

### Formulas

Upstream Time = Distance / (Speed in Still Water - Speed of Stream)

Downstream Time = Distance / (Speed in Still Water + Speed of Stream)

Upstream Time = Downstream Time + 1 (Hour difference)

### Theorems

Basic Speed, Time, and Distance Relations

### Suitable Grade Level

Grades 9-11

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