Question

answer it please i need help​

Answer 1

Answer:

OPTION c = 6m,14m,20m

Step-by-step explanation:

let the sides of rectangles be 3x and 7x

since,

Area of rectangle=l×b

According to Question ,

3x × 7x = 84m²

21x² = 84m²

x² = 4m²

x = 2m

therefore, sides of rectangle are 6m and 14m

and perimeter = 2(l+b)

= 2(6+14)

= 2×20

= 40