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Subject – Mathematics

Chapter 9 – AREA & PERIMETER

Sub-topic 9 : REAL LIFE APPLICATION ON AREA AND PERIMETER

Practice:

SUBJECTIVE QUESTIONS:

1. The area of a rectangle is 96 cm². If the breadth of the rectangle is 8 cm, find its
length and perimeter.

2. How many tiles whose length and breadth are 13 cm and 7 cm respectively are
needed to cover a rectangular region whose length and breadth are 520 cm and 140
cm?

3. Find the cost of tiling a rectangular plot of land 300 m long and 150 m wide at the
rate of $6 per hundred square m.

4. If it costs 1600 rupees to fence a rectangular park of length 20 m at the rate of 25
rupees per m², find the breadth of the park and its perimeter. Also, find the area of
the field.

5. The length of a rectangular wooden board is thrice its width. If the width of the
board is 120 cm, find the cost of framing it at the rate of 5 rupees for 20 cm.

6. The length and breadth of a rectangular courtyard is 75 m and 32 m. Find the cost
of leveling it at the rate of 3 rupees per square m. Also, find the distance covered by
a boy to take 4 rounds of the courtyard.

7. A floor of the room 8 m long and 6 m wide is to be covered by square tiles. If each
square tile is 0.8 m, find the number of tiles required to cover the floor. Also, find the
cost of tiling at the rate of 7 rupees per tile.

OBJECTIVE QUESTIONS:

1. How many rectangles can be drawn with 38 cm as perimeter? Also, find the
dimensions of the rectangle whose area will be maximum.

a) 5

b) 6

c) 7

d) 9