Question

Hola mates answer it​

Answer 1

Answer:

as we know that,

adjacent sides and diagonal makes right angled triangle in rectangle

given ratio of sides is 3:4

let, length of greater side is 4x

and length of smaller side is 3x

by pythagoras theorem

${(4x)}^{2} + {(3x)}^{2} = {85}^{2} \\ 25 {x}^{2} = {85}^{2} \\ taking \: square \: root \: on \: both \: sides \\ \sqrt{25 {x}^{2} } = \sqrt{ {85}^{2} } \\ 5x = 85 \\ x = 19$

therefore length of rectangle =4x=4×19=76m

and

bredth=3x=3×19=57m

.'.perimeter=2l+2b

=2(57+76)

=2×133

=266≈ 260m

hope it helps to you☺️