Question

the length of a rectangle is twice its width is the length of diagonal is 16 root 5 cm find its area

Answer 1

Answer:

512 cm^2

Step-by-step explanation:

let width be x

length = 2x

given √(x^2 + 4x^2) = 16√5

5x^2 = 1280

x^2 = 256

x = +16 or -16

but length cannot be negative....

width = 16 cm

length = 32 cm

Area = l*b = 16*32 = 512 cm^2