Find the capacity of a rectangular cistern in litres whose dimensions are 11.2 m x 6 m x 5.8 m. Find the area of the iron sheet required to make the cistern.

We know that,

Volume of cuboid = Length × Breadth × Height


Therefore,


Volume of the cistern = 11.2 × 6 × 5.8


= 389.76 m3


= 389.76 × 1000


= 389760 litres


Now,


Area of iron sheet that is required to make the cistern = Total surface area of the cistern


We also know that,


Total Surface Area of cuboid = 2 (lb + bh + hl)


= 2 (11.2 × 6 + 11.2 × 5.8 + 6 × 5.8)


= 2 (67.2 + 64.96 + 34.8)


= 333.92 cm2


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