# A closed iron tank 12m long, 9m wide,4m deep is to be made. determine the cost of iron sheet used at the rate of Rs 5 per meter sheet, sheet being 2m wide?

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Given that length of the closed iron tank = 12 m.

Breadth of the closed iron tank = 9 m

The height of the closed iron tank = 4 m.

Total Surface Area of the tank = 2[lb + bh + hl]

= 2[12×9+9×4+4×12] = 384

Area of the rectangular iron sheet = 384

so that length × breadth = 384

But breadth of sheet = 2 m (given)

∴ length = 384 / 2 = 192 m .

Given that cost of iron, the sheet used at the rate of Rs 5 per metre.

The total cost of the sheet = Rs. (192 × 5) = Rs. 960.

Hope I helped you! :)

Breadth of the closed iron tank = 9 m

The height of the closed iron tank = 4 m.

Total Surface Area of the tank = 2[lb + bh + hl]

= 2[12×9+9×4+4×12] = 384

Area of the rectangular iron sheet = 384

so that length × breadth = 384

But breadth of sheet = 2 m (given)

∴ length = 384 / 2 = 192 m .

Given that cost of iron, the sheet used at the rate of Rs 5 per metre.

The total cost of the sheet = Rs. (192 × 5) = Rs. 960.

Hope I helped you! :)

Surface area of tank = 2x(12x9 + 9x4 + 4x12)

= 2x (108 + 36 +48)

= 2 x 192

=384

Rate=Rs.5/2metre

So, total cost = 384*5/2

= 1920/2

= 960

Ans: Rs. 960

= 2x (108 + 36 +48)

= 2 x 192

=384

Rate=Rs.5/2metre

So, total cost = 384*5/2

= 1920/2

= 960

Ans: Rs. 960