an water tank 12m long 9m wide and 4m deep is to be made. determine the cost of iron sheet requrird at the rate of rs. 25 per m .if the sheet is 1.5 m wide.
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Total surface are of tank =2 (llb+bh+hl)=2 (12*9+9*4+4*12)=2 (108+36+48)=192*2=384 mn 2= length of sheet requried =area/breadth = 384/2= 192m now cost of sheet =192*5=960 rs
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