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

Answer:

Since whitewashing is to be done of a Godown, then the four wall and the ceiling has to white washed.

The dimensions of two walls will be Length = 50 M, Height = 10 M.

So the area of the two walls will be = 2 (L X H) = 2 ( 50 x 10) = 1000 M2.

The dimension of the other two walls = Broad = 40 M, Height = 10 M.

So the area of the other two walls = 2(B x H) = 2(40 x 10) = 800 M2.

Dimension of the ceiling = Length = 50 M, Broad = 40 M

So the area of the ceiling = L x B = 50 x 40 = 2000 M2.

So the total area to be white washed = 1000 + 800 + 2000 = 3800 M2.

Cost of white washing = Rs 20 per M2.

So the cost of white washing the complete godown = 3800 x 20 = Rs. 76000.00

Ans: Rs. 76000.00

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Rs.76000
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my answer
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Lateral surface area of godown
= 2h(l+b)
= 2 x 10(50+40)
= 20 x 90
= 1800 square metres.

Area of ceiling
= L x B
= 50 x 40
= 2000 square metres.

Thus total area
= (1800+2000)
= 3800 square metres.

Thus cost of whitewashing
= ? 3800 x 20
= ? 76000.
Thus the cost is ? 76000
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