Usha and Valsamma are running a race. Usha is running on the inner circle. Valsamma is running on the outer circle. Valsamma runs faster than Usha. But still she loses the race. Can you guess why?

Usha and Valsamma are running a race. Usha is running on the inner circle. Valsamma is running on the outer circle.

Valsamma runs faster than Usha. But still she loses the race. Can you guess why?
Have you seen any race where runners start from different places – like in this picture? Guess why?

थोडक्यात उत्तर

Because inner circle has shorter boundary than outer circle. And Valsamma runs on the outer circle so, she has to cover more length. Because of this she loses the race.
Yes I have seen the race which is organized in such circular track. Such arrangement is made to distances equal.

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Fields and Fences

या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?

पाठ 13: Fields and Fences - Exercises [पृष्ठ १५६]

पाठ 13 Fields and Fences
Exercises | Q 4. | पृष्ठ १५६

How much wire did Rahmat give to Ganpat?

Ganpat thanked Rahmat and started fencing his own field. But he needed to get more wire.

How long is the boundary of Ganpat’s field?

Here are pictures of some more fields. Find out which one has the longest boundary?

How much lace will be left in the roll?

Find out the length of the boundary of these shapes. (Hint: You can use a thread)

Now count the squares to find out :

How many different shapes can you make by joining two squares? Draw them on the squared sheet given below. How long is the boundary of each shape?
Try this activity with three squares also.

Find the length of the boundary of square D.
8 squares of side 1 cm are cut out of the square D. Now it looks like shape E. What is the length of the boundary of shape E?
The boundary of this is ______ + ______ + ______ + ______
Can we also say that the boundary is 4 × 1 cm?

Which is the biggest leaf in this picture?
Collect some leaves from the
garden. Place each of them here on this squared sheet. Trace out their edges and check how many squares there are in each leaf.
Which is the biggest leaf?
Which is the smallest leaf?

Guess how many squares of one centimeter can fill this blue rectangle.

Write your guess here.
Check your guess by filling it with small squares.

Look at the picture. Can you divide it into 4 equal pieces? Each piece should have the same number of squares.