English

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

Advertisements
Advertisements

Question

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

Sum
Advertisements

Solution

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

Length of one side

= perimeter/4

= 20 + 4

= 5 m

shaalaa.com
  Is there an error in this question or solution?
Chapter 11: Area and its Boundary - Area and its Boundary [Page 148]

APPEARS IN

NCERT Mathematics Math - Magic [English] Class 5
Chapter 11 Area and its Boundary
Area and its Boundary | Q b) | Page 148

RELATED QUESTIONS

Write true or false.

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


Exercise


A hand span is a reliable measure of length.


Can you find the diameter of a thin wire of length 2 m using the ruler from your instrument box?


What is Dinesh’s height in metres? _____ m _____ cm.


Measure the yellow rectangle. It is ________ cm long.


How close was your earlier guess? Discuss.


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.

  • What is the length of the boundary of lake B in the drawing?

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?

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?

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?

What formula is used to measure the area of your classroom?


Match the following:

  Prefix   Symbol
a. Centi i. k
b. Nano ii. c
c. Mili iii. n
d. Kilo iv. m

Length is ______.


SI unit of electric current is ______.


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?

In the parallax formula D = b/θ, what must be true about the angle θ for the calculation to be correct?


What is an Astronomical Unit (AU)?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×