the lenght , breadth and height is 5cm ,4cm and 3cm. find the cost of colour washing its four walls and ceiling at the rate of rs 7.05
Answers
Answer:
since the dimensions are too small so I think the rate of white washing is 7.50 per centimeter square .
solution:
lengthe = 5cm, breadth = 4cm, height
= 3cm
area of walls = 2(l + b ) × h
= 2 ( 5 + 4) × 3 = 54 cm^2
area of ceiling = length × breadth
= 5 × 4 = 20 cm^2
total area of room to be whitewashed
= area of walls + area of ceiling
= 54 + 20 = 74cm^2
cost of whitewashing 1cm^2 = ₹7.50
cost of whitewashing (74cm^2) the walls and ceiling of the room
= 7.50 × 74 = ₹555
Answer: cost = ₹555
Step-by-step explanation:
Answer:
Rs 521.70
Step-by-step explanation:
Lateral surface area of the room = 2(l+b)h
= 2(5+4)3 cm^2
= 2(9)3 cm^2
= 54 cm^2
Area of the ceiling = l×b
= (5×4) cm^2
= 20 cm^2
So, total area to be coloured = (54+20) cm^2
= 74 cm^2
Therefore, cost of coloring = Rs (74×7.05)
= Rs 521.70
Hope it helps......
Mark my answer as the brainliest.