The height of a triangle is twice the length of its base. the area of the triangle is 50m^2. find the height and base to the nearest tenth of a meter

A = 1/2 b h 
Given: The height of a triangle is twice the length of its base
so h = 2b
so
A = 1/2 (b)(2b)
A = b^2
area of the triangle is 50m^2
b^2 = 50
b = √50
b = 7.1

h = 2b = 50

answer
the height = 14.2 m
and
the base = 7.1 m

9/12 is the answer because 3/4 times 3 each is 9/12