Question

let A, B and C are 3 sets then prove the following :

(i) A - (A intersection B) = A-B
(ii) (A union B) - (B union A) = (A union B) - (A intersection B)​

Answer 1

Answer:

54

Step-by-step explanation:

Let 2:1 be 2x : 1x

Area = lb

L=2x

B=1x

Lb =2x *1x=2x^2

2x^2=162

X^2=162÷2

X^2=81

X=9

Therefore 2x=2*9=18

1x=1*9=9

Thus l=18

B=9

Perimeter of rectangle=2 (l +b)

=2 (18+9)

=2 (27)

=54