Aclosed iron tank 12m long 9m wide and 4m deep is to be made . determine the cost of iron sheet used at the rate of rupees 50 per meter . the sheet being 2m wide

  ₹9600

Step-by-step explanation:

The surface area of the tank is ...

  S = 2(LW +H(L+W)) = 2(12·9 +4(12+9)) = 2(108 +84) = 384 . . . . square meters

If the sheet is 2 m wide, it will take a length of ...

  384 m²/(2 m) = 192 m

At a cost of ₹50 per meter, the cost will be ...

  (₹50/m)·(192 m) = ₹9600

The iron sheet required will cost 9600 rupees.

if i put something wrong your not gonna like it so rather not say nothing.