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There are two beautiful lakes near a village. People come for boating and picnics in both the lakes. The village Panchayat is worried that with the noise of the boats the birds will stop coming. - Mathematics

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प्रश्न

There are two beautiful lakes near a village. People come for boating and picnics in both the lakes. The village Panchayat is worried that with the noise of the boats the birds will stop coming. The Panchayat wants motorboats in only one lake. The other lake will be saved for the birds to make their nests.

  • A longer boundary around the lake will help more birds to lay their eggs. So which lake should be kept for birds? Which lake should be used for boats?
एक पंक्ति में उत्तर
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उत्तर

The boundary around lake A is more than the boundary around lake B. So, lake A should be kept for birds and lake B should be used for boats.

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अध्याय 11: Area and its Boundary - Area and its Boundary [पृष्ठ १५६]

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एनसीईआरटी Math - Magic [English] Class 5
अध्याय 11 Area and its Boundary
Area and its Boundary | Q e) | पृष्ठ १५६

संबंधित प्रश्न

Match the following.

 Column A   Column B
(1) Length  a. kilogram
(2) Mass  b. cubic metre
(3) Area  c. metre
(4) Volume  d. square metre

Fill in the blank.

In the ............ system, length is measured in centimetres.


Exercise


Length of one’s chest can be measured using metre scale.


A hand span is a reliable measure of length.


Complete the analogy.

Height of a person: cm :: Length of your sharpened pencil lead:______?


Fill in the following chart.

Property Definition Basic Unit Instrument used for measuring
Length      
Mass      
Volume      
Time      

Guess whose tail is the longest. Now measure the tails. How good is your guess?


What is the length of a 100 rupee note? Guess. Now measure it using a scale.


Difference in size
Do this for yourself and find the difference.


Measure the yellow rectangle. It is ________ cm long.


You can play this game on the ground. Make two squares of one square meter each. Divide your class into two teams. Ready to play!

  • How many of you can sit in one square meter?

You can play this game on the ground. Make two squares of one square meter each. Divide your class into two teams. Ready to play!

  • How many of you can stand in it?

There are two beautiful lakes near a village. People come for boating and picnics in both the lakes. The village Panchayat is worried that with the noise of the boats the birds will stop coming. The Panchayat wants motorboats in only one lake. The other lake will be saved for the birds to make their nests.

  • How many kilometers long is the actual boundary of lake B?

In which SI unit, you can measure your height?


The distance between one end and the other end is called ______.


The radius of atom is of the order of 1 Å and the radius of nucleus is of the order of fermi. How many magnitudes higher is the volume of atom as compared to the volume of nucleus?


The distance of a galaxy is of the order of 1025 m. Calculate the order of magnitude of time taken by light to reach us from the galaxy.


Consider a sunlike star at a distance of 2 parsecs. When it is seen through a telescope with 100 magnification, what should be the angular size of the star? Sun appears to be (1/2)° from the earth. Due to atmospheric fluctuations, eye can’t resolve objects smaller than 1 arc minute.


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