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A closed tank 12m long 9 m wide 4 m deep is to be made determine the cost of iron sheet at rate of Rs 5 per m sheet bieng 2 m wide .



I will try......

       = 384m3

Cost=384 X 5 
       = rs.1920

i hope it helped.....
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We found out that TSA of cuboid is 384 m^2 So, TSA of cuboid = area of rectangular sheet 384=L*b Given b=2m L=384/2 L=192m Given,(cost per metre not metre square) So, Cost=192 x 5 =960 rs
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