Question

A classroom is 11m long, 8m wide and 5m high. Find the sum of the areas of its floor and four walls.

Answer 1

Hey!

Given,

length = 11 m
breadth =  8 m
height = 5 m

We know,
Area of floor = Area of rect.
                    = l*b
                    = 11*8
                    = 88 m
Area of 4 walls = 2(l+b)h
                         = 2(11+8)*5
                         = 2 * 19 * 5
                         = 190 m²

Answer 2

this is your correct answer...