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प्रश्न
Chelannur village has a milk society. Geetha and Ammini went there to buy 4 litres of milk. But the man could not find the one-litre measure. He had only a 3 litre and a 5-litre bottle with him. But he gave them exactly 4 litres of milk. Explain how he did this.
उत्तर
First of all, he measure 2 times with 5 liter bottle in a container which becomes
= 5 L × 2
= 10 L
Then he pour out 3L of milk thrice, by this way he poured out total milk
= 3 L × 3
= 9 L
The milk left in the container
= 10 L - 9 L
= 1 L
Using this process the milkman gave 1 L of milk using 3 L and 5 L bottles.
APPEARS IN
संबंधित प्रश्न
Have you seen a one-liter water bottle?
Collect a 1-liter bottle and some other small bottles. Guess how many times you have to pour from each of the small bottles to fill the liter bottle.
Check if your guess is correct and fill the table.
| Bottles | My guess | My measure |
| Bottle 1 | ||
| Bottle 2 | ||
| Bottle 3 | ||
Look at the buckets, mugs, glasses and other things in your house. Guess how much water each can hold. Check if your guess is right by using your measuring bottle.
| My Guess | My Measure | |
| Mug | ||
| Glass | ||
| Pot | ||
How much do we use at a time?
| Eye drops | We use less than 1 mL at a time. |
List things we use more than one litre at a time.
- Water for taking bath.
- __________________
- __________________
- __________________
How many liters of water does your family use in a day? Guess and fill in this table.
| Activity | Water used (in buckets) |
Water used (in liters) |
| Cooking and drinking | ||
| Washing clothes | ||
| Cleaning pots, pans | ||
Find out how much water is wasted in a day?
- In a week?
- In a month?
- In a year?
Get a 1 litre bottle (can be an empty bottle of water, oil etc.). Now collect some bottles and a mug, jug, glass, bowl, etc. at your house. Use the 1 litre bottle to check which of these holds more than 1 litre and which one holds less than 1 litre. Make a small drawing if you like.
| Less than 1 litre | More than 1 litre |
| bowl | big cooking pot |
Find out how many 
cups of water will fill your 
bottle.
First guess and then try it out.
Now, fill a different 
bottle with the same cup.
- Which bottle holds less water?
Try it with another 
bottle.
- Which bottle holds the least water?
Guess and then find out:
How many mugs of water do you use to take a bath?
How much water will fill a balloon?
