How money glasses of water is required to fill one litre water bottle, if one glass of water is `25` mL.

Explanation

To solve the problem of how many glasses of water are required to fill a 1-liter water bottle when one glass of water is 25 mL, we can follow these steps:

### Step 1: Understand the volume of 1 liter
1 liter is equal to 1000 mL.

### Step 2: Determine the volume of one glass of water
We know that one glass of water is 25 mL.

### Step 3: Calculate the number of glasses needed
To find out how many glasses of water are needed to fill 1 liter (1000 mL), we can use the formula:

\[ \text{Number of glasses} = \frac{\text{Total volume in mL}}{\text{Volume of one glass in mL}} \]

Substituting the values:

\[ \text{Number of glasses} = \frac{1000 \text{ mL}}{25 \text{ mL}} \]

### Step 4: Perform the division
Now, we perform the division:

\[ \text{Number of glasses} = 40 \]

### Conclusion
Therefore, 40 glasses of water are required to fill a 1-liter water bottle.

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