Page 109 - Maths Skill - 6

Perimeter and Area 107

4. Find the area and perimeter of a rectangle of length 5 cm and breadth 4 cm.
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5. The area of rectangle is 20 cm . If the breadth is 4 cm, then find out the length of the rectangle.
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6. The area of a rectangular field is 4800 m . If its length is 80 m, then find its breadth.
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7. If the cost of flooring a rectangular area is ` 125 at the rate of ` 2.50 per m . Find the area of the floor.
8. A playground is 30 m long and 15 m wide. Find the cost of levelling it at the rate of ` 3 per square metre.
9. The length and breadth of a park are 70 m 30 cm and 30 m 40 cm respectively. What is the cost of
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turfing the park at the rate of ` 10 per m ?
10. The length of a rectangle is twice its breadth. Find the area of the rectangle.

11. Find the change in area of a rectangle when its length is doubled, breadth remaining the same.
12. Find the length of a rectangle whose area is 49 cm and whose breadth is 28 mm.
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13. What is the cost of a plot of land 35.5 m long and 17.5 m wide at the rate of ` 220 per square metre?
14. Fill in the blanks in respect of squares.

S. No. Side Area Perimeter
(i) 3.5 cm –––––––––– ––––––––––
(ii) –––––––––– –––––––––– 20 cm
(iii) –––––––––– 16 cm 2 ––––––––––

15. Find the cost of polishing the floor of a square hall at the rate of ` 15 per m , if each side of the hall is
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12.5 m.
16. If each side of a square is doubled what is the change in its area?
17. Find the side of a square whose area is 169 cm .
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18. A square hall has a side 15.6 m. Find the cost of polishing the floor at the rate of ` 30.50 per m .
19. The area of a square of side 16 cm is the same as that of a rectangle of length 64 cm. What is the breadth
of the rectangle?

PUZZLE
Below is the house plan of Deepak. It is in a rectangular plot. Look at the plan. Find out the vacant dimensions.

Bath room Utility
(5 × 8) (___ ft × ___ ft)
Bed room Area = 40 sq ft Area = ______
(20 × 20)
Area = 400 sq ft Kitchen
(20 × 12)
Area = 240 sq ft
35 ft
Small Bed room Hall
(20 × ____)
Area = 200 sq. ft Area = ________

Parking Garden
(____ ft × ____ ft) (___ ft × ___ ft)
Area = ____ Area = _____