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प्रश्न
How much does a postcard cost?
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उत्तर
The cost of a postcard is Re 1.
APPEARS IN
संबंधित प्रश्न
Father gave them some idea of the weight of each thing.
| Thing loaded | Weight |
| A sack of wheat | 100 kg |
| A sack of rice | 35 kg |
| Water tank | 50 kg |
| Almirah | 70 kg |
| A table | 10 kg |
| A chair | 5 kg |
| A mattress | 20 kg |
| Bamboo ladder | 10 kg |
| Pots and pans | 10 kg |
Find out the total weight they had loaded on the cart.
Now, you also make your own balance. Write down how you made it. Also draw a picture of your balance in the box below.
Make pairs of different things and use the balance to decide which is heavier. First guess which thing will take the pan down and then check with your balance.
Take a small plastic packet.
Put it in one pan of the balance. Put the soap in the other pan. Slowly add sand to the packet till the pans are balanced.
Close the packet with a rubber band or string. Now stick a strip of paper and write ‘ g’ on it.
Is the weight on any of the pans equal to 1 kilogram? Mark it.
Which is heavier? One kilogram cotton or one kilogram iron?
Now you show how Abdu will use these stone pieces to weigh —
4 kg of firewood -
Now you show how Abdu will use these stone pieces to weigh —
3 kg of firewood.
Akash wants to send a parcel of the Math Magic textbook to his friend Rani in Chennai. The book weighs 200 g. See the chart to find the cost of posting the book.
There are 3 marbles of the same size but one marble is slightly heavier or lighter than the other two. Can you find which is that marble and if it is heavier or lighter? You can use a balance only two times.
