Question

Find the missing dimension in the figure below if the surface area is given as 216.18 m2

Answer 1

x=4.3m

Explanation:

It is made up by six graphics.

Two triangles=1/2*x*5.6*2=5.6x

Base rectangular: 11.3x

Back rectangular: 11.3*5.6=63.28

Front rectangular:11.3*7.1=80.23

Add together: 5.6x+11.3x+63.28+80.23=216.18

16.9x=72.67

x=4.3m