Question

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Answer 1

Answer:

4) a) area = l*b = 25 *15 unit^2

= 375 unit square

perimeter - 2(l+b) = 2(25 + 15)

perimeter = 80 units

b)area of square = 36cm^2

side = root of area = 36 root = 6cm

perimeter is equal to 4*6cm = 24cm

Step-by-step explanation:

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Answer 2

Answer:

Perimeter of a rectangle = 2×(Length+Breadth)

(i) Length = 16.8 cm

Breadth = 6.2 cm

Perimeter = 2×(Length+Breadth)

= 2×(16.8+6.2) =46 cm

(ii) Length = 2 m 25 cm

=(200+25) cm (1 m = 100 cm )

= 225 cm

Breadth =1 m 50 cm

= (100+50) cm (1 m = 100 cm )

= 150 cm

Perimeter = 2×(Length+Breadth)

= 2×(225+150) =750 cm

(iii) Length = 8 m 5 dm

= (80+5) dm (1 m = 10 dm )

= 85 dm

Breadth = 6 m 8 dm

= (60+8) dm (1 m = 10 dm )

= 68 dm

Perimeter = 2×(Length+Breadth)

= 2×(85+68) =306 dm