Final answer:
To solve for r in the equation d = rt, divide both sides by t, yielding the solution r = d/t, which represents the rate of distance covered per unit time. The correct option is a) r = d/t.
Step-by-step explanation:
We are asked to solve for r in the equation d = rt. This equation is commonly used to relate distance (d), rate (r), and time (t). According to the equation, the distance (d) is equal to the rate (r) times the time (t).
To solve for r, we need to isolate the variable r:
- Start with the original equation: d = rt.
- Divide both sides by t to isolate r: r = d/t.
Therefore, the correct option is a) r = d/t. This gives us the rate at which the distance is covered per unit of time.