Question

a Godown is 50 M long 40 m board and 10 metre hight Find the cost of whitewashing its four wall and ceiling at 20rupeea per squre metre
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Answer 1

4 walls + ceiling = lateral surface area + ceiling

= 2*height (length*breadth) + (length*breadth)

= 2*10 (50*40) + (50*40)

= 20(2000) + (2000)

= 40000+2000

= 42000m^3

cost = 42000*20

= 840000 rupees