Question

find the cost of papering a room 20 m long, 12 m wide and 5 m high at the rate 180 per square metre​

Answer 1

Answer:

2(20×12±12×5±20×5)

⇒2(400) ⇒ 800         cost⇒800×180=14400

Answer 2

Answer:

57600 rupees

Step-by-step explanation:

Given---> Dimension of room are 20m , 12m , 5m and cost of papering is 180 rupees per square meter .

To find----> Total cost of papering .

Solution----> ATQ,

Length of room = 20m

Breadth of room = 12 m

Height of room = 5 m

We know that,

Area of four walls = 2 ( length + breadth ) × height

So area of paper used in papering the walls of room = 2 ( 20 + 12 ) × 5

= 2 ( 32 ) × 5

= 32 × 10

= 320 m²

Cost of papering per m² = 180 rupees

Total cost of papering = 320 × 180

= 57600 rupees