Question

1. Copy and complete the following table :
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Answer 1

Answer:

area of rectangle = L * B --------------eq1

perimeter of rectangle = 2*(L+B) ------------eq2

where L is length and B is breath

(i)

using equation 1

=> area of rectangle = L * B

=> 15 = 5 * B

=> B = 15/5 = 3 m

(ii)

using eq 2

=>perimeter of rectangle = 2*(L+B)

=> 24 = 2 *( 5 + B)

=> B = 12-5= 7 cm

so using eq 1

=> area of rectangle = L * B

=> area of rectangle = 5 * 7 = 35 cm^2

(iii)

using eq 2

=>perimeter of rectangle = 2*(L+B)

=> 49 = 2 *( L + 9.5)

=> L = 24.5 - 9.5 = 15 cm

so using eq 1

=> area of rectangle = L * B

=> area of rectangle = 15 * 9.5 = 210 cm^2

(iv)

using equation 1

=> area of rectangle = L * B

=> 480 = L * 30

=> L = 480/30 = 6 cm

so

using eq 2

=>perimeter of rectangle = 2*(L+B)

=> perimeter of rectangle = 2 * (6 + 30)

=> perimeter of rectangle = 72 cm