Question

pair of adjacent sides of a rectangle are in ratio 3 is to 4 if diagonal is 20 cm find the length of the sides and hence the perimeter of the rectangle

Answer 1

Step-by-step explanation:

let the side of rectangle be 4x and 3x respectively.

Now,

using Pythagoras theorem

20square=3xsquare+4xsquare

so,400=25xsquare

so,x=4

so,1st side=3into4=12cm

2nd side=4into4=16cm

so, perimeter=12+16+12+16=56cm.