Question

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

Answer 1

Answer:

278 cm²

Step-by-step explanation:

Length of room = 11 m

Breadth of room = 8 m

Height of room = 5 m

∴ Floor Area = l × b

                     = 11 × 8 m²

                     = 88 m²

Area of the four walls = 2h(l+b)

                                    = 2 × 5(11 + 8)

                                    = 10 × 19

                                    = 190 m²

∴ Area of the floor + Area of four walls

⇒88 + 190 m²

⇒278 m²