Question

the length, breadth and height of a cuboid is 8m 6m and 4m find it area of four walls?

Answer 1

So to find the area of walls of a room we will calculate it by this formula

         Area of rectangle=l*b

                                    =2(8*4)+2(6*4)

                                    =64+48

 Area of the four walls =112 m^2

Diagonal (c)^2= a^2 + b^2 (Pythagoras theorem)

                       = (8)^2 + (6)^2

                       = 64 + 36

              (c)^2 = 100

                    c = square root  of 100

                    c = 10 m

Therefore the diagonal is of 10 m .