Page 155 - ICSE Math 5

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(c) Find the cost of cementing a floor of area 485 cm at the rate of ` 84 per 3 cm .
(d) If the length of the floor of a room is 10 m and its breadth is 18 m, how many square
tiles of side 2 m each will be required to cover the floor?

(e) A sheet of paper is 32 cm long and 20 cm wide. How many cards can be pasted on it
if each card is 10 cm long and 4 cm wide?

(f) A tablecloth measures 2.5 m in length and 2 m in breadth. Find the perimeter and
area of the tablecloth.

Values and Life Skills

The total area of the walls and ceiling of a hall is 225 m . If the cost of painting is ` 150 per square
2
metre, what is the total cost of painting the walls and ceiling of the hall? How can you prevent
the walls of your house from getting dirty?

ACTIVITY

What To Do?
To show that figures having the same area may have different perimeters

What We Need?
A sheet of square paper, ruler and colour pencils

How To Do?

Let’s do this activity in two parts.
Part A
 Take a square sheet of paper and colour 10

consecutive squares blue in a row to form a
rectangle. Name it as Figure A. Figure A
Find the perimeter and area of Figure A.

 Next colour 5 consecutive squares red. Colour 5 more squares
red immediately above it. Name it as Figure B.
Find the perimeter and area of Figure B. Figure B

 Tabulate your answer in the given box.

Figure Perimeter Area

Figure A

Figure B

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