The area of a triangle is 27 square feet. its height is three times the length of its base. find the length and width of the base

Let the length of the base be x.

Height = 3x

Area = 27

= 27

= 27 

= 18

x =  = 4.24264068712 ≈ 4.24

Hence, 

The length of the base is 4.24 ft.

Height = 3x = 3 * 4.24264068712 = 12.7279220614 ≈ 12.72

Hence,

The height is 12.72 ft