Question

A room is 40 m long, 30 m broad and 10m high. Find the cost of whitewashing its four wall and ceiling at R 20 per sq m.​

Answer 1

• Rs 52000 is the required cost of whitewashing .

Step-by-step explanation:

According to the Question

It is given that,

• Length ,l = 40m
• Breadth ,b = 30 m
• Height ,h = 10 m

We have to calculate the Cost of Whitewashing its four wall and celling .

Area to Whitewashing = Lateral Surface Area + Area of Ceiling

⇢ Area of Whitewashing = 2h(l+b) + l×b

⇢ Area of Whitewashing = 2 × 10 (40+30) + 40×30

⇢ Area of Whitewashing = 20(70) + 1200

⇢Area of Whitewashing = 1400 + 1200

⇢ Area of Whitewashing = 2600 m²

Now, calculating the total cost of Whitewashing .

Cost of Whitewashing is Rs 20 Per m²

So, Cost of Whitewashing 2600 m²

⇢ Total Cost of Whitewashing = 2600 × 20

⇢ Total Cost of Whitewashing = Rs 52000

• Hence , total cost of Whitewashing is Rs 52000 .

Answer 2

Answer:Total cost of whitewashing is Rs 52000