Please answer the question.

Please find below the solution to the asked query:

Given : Width =  5 units , So from given diagram , Length  = 7 units and Height = 4 units   ( We get that by counting number of squares )

We know : Total surface area of cuboid  = 2 ( Length $\times$ Width  + Width $\times$ Height + Length $\times$ Width ) ,So

Sum of areas of faces of given cuboid = 2 ( 7 $\times$ 5 + 5 $\times$ 4 + 7 $\times$4 ) = 2 ( 35 + 20 + 28 ) = 2 $\times$ 83  = 166 square units         ( Ans )

Hope this information will clear your doubts about topic.