Mass of 270g block of iron displaces a volume of 30 mL of a liquid. The density ( in g `//` mL) is `"_____________"`.

Explanation

To find the density of the iron block, we can follow these steps:

### Step 1: Understand the formula for density
Density is defined as mass per unit volume. The formula for density (D) is given by:
\[ D = \frac{\text{mass}}{\text{volume}} \]

### Step 2: Identify the mass and volume
From the question, we have:
- Mass of the iron block = 270 g
- Volume displaced = 30 mL

### Step 3: Substitute the values into the density formula
Using the values identified:
\[ D = \frac{270 \text{ g}}{30 \text{ mL}} \]

### Step 4: Perform the calculation
Now, we perform the division:
\[ D = \frac{270}{30} = 9 \text{ g/mL} \]

### Step 5: State the final answer
The density of the iron block is:
\[ \text{Density} = 9 \text{ g/mL} \]

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