Question

hello....... please help.......

Answer 1

Area of doors = 3 m × 4 m = 12 m²

=> So area of 8 doors = 12 × 8 = 96 m²

Area of windows = 3 × 2 = 6 m²

=> area of six windows = 6 × 6 = 36 m²

Now lateral surface area of cuboid = 2(l + b)h

=> 2(60 + 40)30

= 2(100)30

= 200 × 30

= 6,000 m²

Now area after excluding doors and windows

= 6000 - 96 - 36

= 5868

Area of roof = 60 × 40 = 2400 m²

So total area for painting = 5868 + 2400 = 8268 m²

Cost of painting 1 m² = ₹25

So cost of painting 8268 m² = 8268 × 25

=> Cost = ₹2,06,700

Answer :- 2,06,700


b) Area of floor = 60 × 40 = 2400 m²

Carpeting cost = ₹25

=> Total cost = 2400 × 25

=> Total cost = ₹60,000

Answer :- 60,000

Answer 2

Answer:

(a) 206700

(b) 60000

Step-by-step explanation:

Length of auditorium = 60 m.

Breadth of auditorium = 40 m.

Height of auditorium = 30 m.

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

                              = 6000 m².

Area of roof = l * b

                    = 2400 m²

(i) 8 doors:

Length of door = 3 m.

Breadth of door = 4 m.

Area of 8 doors = 8(l * b)

                          = 8(3 * 4)

                          = 96 m².

(ii) 6 windows:

Length of window = 3 m.

Breadth of window = 2 m.

Area of 6 windows = 6(l * b)

                                = 6(3 * 2)

                                = 36 m².

Total area of painting = Area of 4 walls + Area of roof

                                    = (6000 - 96 - 36) + 2400

                                    = 5868 + 2400

                                    = 8268.

(a)

Cost of painting the walls and the roof excluding the doors and windows:

= 8268 * 25

= 206700.

(b)

Cost of carpenting the floor = 2400 * 25

                                              = 60000.

Hope it helps!