Math Lab
Home/Class V/Chapter 9

Chapter 9: Coconut Farm

A farmer wants to put a fence around his coconut farm. He needs to know the total length of fencing , the perimeter. He also wants to plant many coconut trees inside. To know how many will fit, he needs the area of the land.

In this chapter we learn the difference between perimeter and area. We measure perimeter as a length and area as a "covering" of square units. By the end you will be able to plan any rectangular garden, room, or playground.

What's inside

  • Perimeter , the distance around a shape.
  • Area , the space inside a shape.
  • Area of rectangles and squares.
  • Real-life problems with rooms, gardens, and fields.

How to read this chapter

Read in order , perimeter first, then area, then mixed problems. Draw every example on a grid paper to feel the difference. The hands-on tasks need a tape measure and a notebook with a grid.

Sub-topics

3 pages
01
Perimeter , the boundary
Finding the total length around the edge of a shape.
02
Area , the covering
Finding the space covered inside a flat shape using square units.
03
Area and perimeter problems
Mixed real-life problems using both perimeter and area.

Practice quiz

Answer the questions; explanations appear after each.

Quiz
Chapter 9 : Mixed practice
8 questions · pick the best answer
Q1

Perimeter of a square of side 6 m is:

Q2

Area of a rectangle 8 m by 5 m is:

Q3

A square has area 49 m2^2. Its side is:

Q4

Perimeter of rectangle 10 m by 4 m:

Q5

Area is measured in:

Q6

If you want to fence a field, you find its:

Q7

Area of a 4 m by 4 m square:

Q8

Tiles 1 m by 1 m fit a 5 m by 3 m floor. How many tiles?