मराठी

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.

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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.

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

Here, the scale is 1 cm = 1 km

So, length of the actual boundary of lake B = 25 km

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

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एनसीईआरटी Mathematics Math - Magic [English] Class 5
पाठ 11 Area and its Boundary
Area and its Boundary | Q d) | पृष्ठ १५६

संबंधित प्रश्‍न

The principle of ‘parallax’ in section 2.3.1 is used in the determination of distances of very distant stars. The baseline AB is the line joining the Earth’s two locations six months apart in its orbit around the Sun. That is, the baseline is about the diameter of the Earth’s orbit ≈ 3 × 1011m. However, even the nearest stars are so distant that with such a long baseline, they show parallax only of the order of 1” (second) of arc or so. A parsec is a convenient unit of length on the astronomical scale. It is the distance of an object that will show a parallax of 1” (second) of arc from opposite ends of a baseline equal to the distance from the Earth to the Sun. How much is a parsec in terms of meters?


Answer the following question.

Star A is farther than star B. Which star will have a large parallax angle?


500 gm = ______ kilogram.


Match the following.

1. Length of the fore arm metre
2. SI unit of length second
3. Nano 103
4. SI Unit of time 10–9
5. Kilo Cubit

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?


Now guess the length and width of many other things. Measure and find the difference between your measure and your guess.

Size of Your guess in cm Your measure in cm
  Length Width Length Width
100 Rupee note        
10 Rupee note        
20 Rupee note        
5 Rupee note        
Post card        
Math-Magic book        

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!

  • Which team could make more children sit in their square? How many?

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 cm is the length of the boundary of lake A in the drawing?(use thread to find out)

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 A?

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.

  • Find the area of lake B on the drawing in square cm. What is its actual area in square km?

In which SI unit, you can measure your height?


Length is a fundamental quantity.


What are the materials needed to find the length of a banana?


Give some examples of larger length measures.


SI unit of electric current is ______.


Larger unit for measuring time is ______.


To measure the distance of a planet from the earth, ______ method is used.


Which instruments are used to measure very small distances at the atomic scale?


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