Question

a go down is 50 m long 40 m broad 10 m high find the cost of white Wasing it's four walls and ceilings at RS 20 per metre

Answer 1

Area required for white washing
= CSA+Area of Top
=2(l+b)×h+l×b
=2(50+40)×10+50×40
=2×90×10+200
=1800+200
=2000m²
Cost of white washing 1m²=₹20
Cost of white washing 2000m²=₹(2000×20)
=₹40000

Hope this helps

Answer 2

Your answer is
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Given, length=50m
Breadth=40m
Height=10m
Area of four walls of cuboid
=2(lb+bh+lh)
So,
=2({(50)(40)+(40)(10)+(50)(10)}
=2{2000+400+500}
=2×2900
=5800msq.
Now,
Cost of white washing=rs20/m
"""""""""""""""""""""""""""=20×5800
=Rs1,16,000
Hope it helps uh plz mark as brainliest