A) Rs. 550
B) Rs. 1050
C) Rs. 1125
D) Rs. 1150
Correct Answer: C
Solution :
Since the tank is open at the top, its total surface area \[=15\times 10+2(15\times 6+10\times 6)\] \[=150+300=450\,{{m}^{2}}\] Since width of the sheet is 2m, therefore its length \[=\frac{450}{2}=225m\] Cost of the iron sheet \[=Rs.225\times 5=Rs.1125\]
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