Question

A cow gave 14L 500ml of milk in the morning and 13L and 750ml of milk in the evening. How much milk did the cow give in the day?

Answer 1

Hint: Convert the given data into a single convenient unit either liters or milliliters using the conversion \[\text{1 liter }=\text{ 1}000\text{ milliliters}\] . Then, add up the amount of milk given in the morning and in the evening by the cow. The sum is the total milk the cow gives in a day.

Complete step by step solution:
You must be aware of unit conversion i.e. how to convert a given unit into the other. Here, we are given with two different units, one in liters and the other in milliliters. We know,
\[\text{1 liter }=\text{ 1}000\text{ milliliters}\]
We have been given that the cow gives 14L 500ml [L=liter and ml=milliliter] of milk in the morning. Let us convert the whole thing in terms of milliliters. First, we can express 14L 500ml as 14L+500ml. Now, we will convert the 14L into ml. So, the milk in only milliliters will be,
\[\Rightarrow 14\times 1000+500=14500ml\]
The cow gives 13L 750ml of milk in the evening. Let us convert the whole thing in terms of milliliters. First, we can express 13L 750ml as 13L+750ml. Now, we will convert the 13L into ml. So, the milk only in milliliters will be,
\[\Rightarrow 13\times 1000+750=13750ml\]
In the question, it is asked that we have to find out the total amount of milk the cow gives in a day, which we can find out by adding up the amount of milk given by cow in morning as well as in the evening.
Total amount of milk given in a day = amount of milk in morning + amount of milk in evening
So, we can write that
  \[\begin{align}
  & \text{Total amount = }14500+13750 \\
 & \Rightarrow 28250ml \\
\end{align}\]
Therefore, the total amount of milk given by the cow in a whole day is 28250 milliliters.

Note: Students can make mistakes in doing conversion and adding up the values, looking at the question at first and thinking that it is very simple. Observe and solve the question carefully. Here, we have converted into milliliters, we can also convert it to liters.
Let us consider 14L 500ml, we can write it as 14L+500ml. Now, using conversion, we get, \[500ml=\dfrac{1}{1000}\times 500\Rightarrow 0.5L\]Now, we can add it as \[14L+0.5L=14.5L\] .