Question

the length of a 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