Question

the length breadth and height is 8cm, 6cm and 4 cm repetively find the surface area, diagonal and 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 .

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