Question

A square hole of cross sectional area 4 cm² is drilled across a cube with its length parallel to a side of the cube. If an edge of the cube measures 5 units, what is the total surface area of the structure so formed?

• A. 158 cm²
• B. 190 cm²
• C. 166 cm²
• D. 182 cm²

Answer 1

The correct option is D 182 cm²

Ans: d) 182 cm²

New SA=(original SA)+(SA of square channel formed through the cube)-(squares on 2 faces)

= (25x6)+(2x5x4)-(4+4) ;=182 sq units