मराठी

The fencing of a square garden is 20 m in length. How long is one side of the garden?

Advertisements
Advertisements

प्रश्न

The fencing of a square garden is 20 m in length. How long is one side of the garden?

बेरीज
Advertisements

उत्तर

Given perimeter of garden = 20 m which has to be fenced.

Length of one side

= perimeter/4

= 20 + 4

= 5 m

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 11: Area and its Boundary - Area and its Boundary [पृष्ठ १४८]

APPEARS IN

एनसीईआरटी Math - Magic [English] Class 5
पाठ 11 Area and its Boundary
Area and its Boundary | Q b) | पृष्ठ १४८

संबंधित प्रश्‍न

The nearest star to our solar system is 4.29 light years away. How much is this distance in terms of parsecs? How much parallax would this star (named Alpha Centauri) show when viewed from two locations of the Earth six months apart in its orbit around the Sun?


Write true or false.

Every measurement involves two things – a number and a unit.


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

500 gm = ______ kilogram.


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


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


How close was your earlier guess? Discuss.


Chumki, Jhumri, and Imran need wire to make a fence.

  • How much wire in all will the three need?

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)

Give some examples of larger length measures.


What is the unit of measurements of very small lengths?


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


What is the unit of length?


The Unit used to measure length ______.


What unit will you use to measure the length of our classroom?


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


In an experiment to estimate the size of a molecule of oleic acid 1 mL of oleic acid is dissolved in 19 mL of alcohol. Then 1 mL of this solution is diluted to 20 mL by adding alcohol. Now 1 drop of this diluted solution is placed on water in a shallow trough. The solution spreads over the surface of water forming one molecule thick layer. Now, lycopodium powder is sprinkled evenly over the film and its diameter is measured. Knowing the volume of the drop and area of the film we can calculate the thickness of the film which will give us the size of oleic acid molecule.

Read the passage carefully and answer the following questions:

  1. Why do we dissolve oleic acid in alcohol?
  2. What is the role of lycopodium powder?
  3. What would be the volume of oleic acid in each mL of solution prepared?
  4. How will you calculate the volume of n drops of this solution of oleic acid?
  5. What will be the volume of oleic acid in one drop of this solution?

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.


According to the modern definition, what fraction of a second does light travel to define one metre?


Why is the speed of light used to define the metre?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×