Question

the length of rectangle is twice its breadth if the length of its diagonal is 16√5 cm find its area

Answer 1

let breadth be x
then length is 2x

√4x^2+x^2 = √5×x

√5×x=16√5

x=16

breadth = 16
length = 32

area= length×breadth
16×32= 512cm^2

Answer 2

let breadth be x
then length is 2x

√4x^2+x^2 = √5×x

√5×x=16√5

x=16

breadth = 16
length = 32

area= length×breadth
16×32= 512cm^2