Question

what is the area of the rectangle below in square centimetres ? ANSWERS (A). 16 (B). 28 (C). 4 (D). 22

Answer 1

Answer:

as (2x-1)=(x+3) because it is a rectangle

x =4

so one side is 4and other is 7

area =l x b

=28 cm²

Answer 2

Answer:

$b).28 {cm}^{2}$

Step-by-step explanation:

$(x + 3) = (2x - 1) \: \: \: \: \: \: {because \: opposite \: side \: of \: rectangle \: are \: equal} \\ 3 + 1 = 2x - x \\ 4 = x \\ \\ so \: width \: = x = 4cm \\ so \: area \: of \: rectangle \: = l \times b \\ =(x + 3)x \\ = (4 + 3)4 \\ = 7 \times 4 \\ = 28 {cm}^{2}$