Q7 of 77 Page 21

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

Given,


Length of tank = 12 m


Width of tank = 9m


Depth of tank = 4m


So,


Area of sheet required = total surface area of tank


=


=


Let


=


=


=


Then,


Cost of iron sheet at rate Rs.5 per metre = 5×192 = Rs. 960


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