Question

A godown is 50 m long, 40 m broad and 10 m high. Find the cost of whitewashing its four
walls and ceiling at 20 per square metre.
​

Answer 1

Answer:

₹76,000

Step-by-step explanation:

We have to find the area of the 4 walls and the ceiling.

Lateral Surface area of a cuboid = 2(l + b) × h

= 2(50 + 40) × 10

= 2 × 90 × 10

= 1800 m^2

Area of ceiling = l × b

= 50 × 40

= 2000 m^2

Therefore, total surface area to be whitewashed:

= 2000 + 1800

= 3800 m^2

Thus, cost of whitewashing at ₹20/m^2:

= 3800 × 20

= ₹76,000

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Answer 2

$\huge \purple {AnsWer}$

Dimension of godown

⠀L = 50m⠀⠀B = 40m ⠀H = 10m

⠀⠀Area of 4 walls = 2(L+B) × H

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀= 2 ( 50 + 40 )

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠀= ( 2 × 90 × 10 )m²

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀= 1800m²

Area of celling = ( L×B )sq.unit

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀= ( 50 × 40 ) m²

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀= 2000m²

⠀⠀Total area = 2000 + 1800

⠀⠀⠀⠀⠀⠀= 3800m²

Total cost = Total area × Cost per m²

⠀⠀⠀⠀⠀⠀= 3800 × 20

⠀⠀⠀⠀⠀⠀= ₹ 76000

So your answer is ₹ 76000.