Question

The length of rectangle is 3 times its width if the perimeter is 8√10 find the length of the rectangle.

Answer 1

Let the width be x

and length be 3x

Perimeter =8√10

2 × (l + b) = 8√10

2 × (3x + x) = 8√10

2 × 4x = 8√10

4x = 8√10/ 2

4x = 4√10

x = 4√10/4

x= √10

Therefore,

Length = 3x

= 3×√10

=3√10

Hope it is helpful.....