Answer:
A = 50 cm²
Explanation:
the area (A) of a rectangle is calculated as
A = length × breadth
let breadth be b then length is 2b ( twice the breadth )
the perimeter (P) of a rectangle is calculated as
P = 2( length + breadth)
given P = 30 , then
30 = 2(2b + b) = 2(3b) = 6b ( divide both sides by 6 )
5 = b
the breadth is 5 cm and length is 2 × 5 = 10 cm
Then
A = 10 × 5 = 50 cm²