Certainly! Let's break down the problem step by step to find the number of units of water consumed in one month.
1. Identify the previous month's meter reading: We know from the problem statement that the meter reading at the end of the previous month was 1380 units.
2. Identify the present month's meter reading: Similarly, we know that the meter reading at the end of the present month is 1400 units.
3. Calculate the consumed units of water: To determine the amount of water consumed in one month, we subtract the previous month's meter reading from the present month's meter reading.
[tex]\[
\text{Consumed units} = \text{Present month's meter reading} - \text{Previous month's meter reading}
\][/tex]
4. Perform the subtraction:
[tex]\[
\text{Consumed units} = 1400 \text{ units} - 1380 \text{ units}
\][/tex]
5. Result:
[tex]\[
\text{Consumed units} = 20 \text{ units}
\][/tex]
Therefore, the number of units of water consumed in one month is 20 units.