Question

3. Find the perimeter and area of a rectangle whose : (i) length = 25 cm and breadth = 18 cm (ii) length = 27 cm and breadth = 17 cm (iii) length = 7.2 m and breadth = 80 cm =​

Answer 1

Answer:

I) perimeter = 86 Area = 450 cm

ii) perimeter = 88 Area = 459 cm

iii) perimeter = 174.4 Area = 576cm

Step-by-step explanation:

I) perimeter of rectangle = 2(length + breadth)

= 2( 25 + 18)

= 2 × 43

86 cm

Area of Rectangle = length × breadth

= 25×18

= 450 cm

ii) perimeter of rectangle = 2(length+ breadth)

= 2(27+17)

= 2×44

= 88 cm

Area of rectangle = length x breadth

= 27× 17

= 459 cm

iii) Perimeter of rectangle = 2(length+breadth)

= 2(7.2+80)

= 2×87.2

= 174.4

Area of rectangle = length x breadth

= 7.2×80

= 576 cm

Answer 2

Answer:

i) Perimeter = 2 ( l + b ) = 2 ( 25 + 18 ) cm = ( 2 x 43 ) cm = 86 cm

  Area = l x b = ( 25 x 18 ) cm² = 450 cm²

ii) Perimeter = 2 ( l + b ) = 2 ( 27 + 17 ) cm = ( 2 x 44 ) cm = 88 cm

  Area = l x b = ( 27 x 17 ) cm² = 459 cm²    

iii) Perimeter = 2 ( l + b ) = 2 ( 720 + 80 ) cm = ( 2 x 800 ) cm = 1600 cm

  Area = l x b = ( 720 x 80 ) cm² = 57600 cm²    

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