Answers

2015-11-18T21:45:37+05:30
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  m^{2}

Area of the rectangular iron sheet = 384  m^{2}
so that  length × breadth = 384  m^{2}

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! :)
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hope that helps you :) for any enquiries or questions you can comment here or mail me at [email protected]
Umm y did u cmmt on answer?
its ok. anyone can comment on answer. plz dont report comments if posted under any answer, It's a good sign! Your answer is being popular!
Ok. I'm really sorry Rhibhu
2015-11-18T21:48:27+05:30
Surface area of tank = 2x(12x9 + 9x4 + 4x12)
                                  = 2x (108 + 36 +48)
                                  = 2 x 192
                                  =384 m^2
Rate=Rs.5/2metre 
So, total cost = 384*5/2
                      =     1920/2
                      =  960

Ans: Rs. 960
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hope that helps you :) for any enquiries or questions you can comment here or mail me at [email protected]