A coffee urn holds 12 litres when full. Harry fills coffee cups from the urn until the coffee runs out.
A)How many 140ml cups of coffee can be filled from the urn?
B)At the end there is not enough coffee left to fill a cup, Harry decides to drink it himself. How much coffee is there left for him?
1 liter = 1000ml
A. 12000/140 = ?
B. Decimal portion of A.
To find the answers to these questions, we first need to determine how many 140ml cups can be filled from the full 12 litre coffee urn.
A) To find the number of cups that can be filled, we need to convert the volume of the urn and the volume of each cup to the same unit. Let's convert the 12 litres (12000 ml) to cups:
12 litres = 12000 ml
Now, we can divide the total volume of the urn (12000 ml) by the volume of each cup (140 ml):
12000 ml / 140 ml = 85.71 cups
Since we can't have a fraction of a cup, we round down to the nearest whole number. Therefore, Harry can fill 85 cups of coffee from the urn.
B) After filling the cups, there is some amount of coffee remaining in the urn that is not enough to fill an entire cup. To find out exactly how much coffee is left, we need to subtract the amount of coffee used from the initial volume of the urn.
To determine the amount of coffee used, we multiply the number of cups filled (85 cups) by the volume of each cup (140 ml):
85 cups * 140 ml = 11900 ml
Now, subtract the amount of coffee used from the initial volume of the urn:
12000 ml - 11900 ml = 100 ml
Harry is left with 100 ml of coffee, which is not enough to fill a cup, so he decides to drink it himself.