A tank 20 m long, 12 m wide and 8 m deep
is to be made of iron sheet. It is open at the
top. Determine the cost of iron-sheet, at
the rate of 12:50 per metre, if the sheet is
2.5 m wide.
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Answer:
here is correct solutioniron sheet required= {csa of tank + area of base}/area of sheet
=2 (l+b)h + l×b/1×2.5m
here l = 20m
b = 12m
h = 8m
= 2 (32)8+20×12/2.5
= 16×32+240/2.5
=512+240/2.5
=752/2.5m=sheet required
cost =cost of 1 m sheet × sheet required
=12.50×752/2.5
=5×752
cost=Rs3760
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