A tank is 25 m long, 12 m wide and 6 m deep. The cost of plastering its walls and bottom at 75 paise per sq. m, is:	Choose the correct option
A) Rs. 456  B) Rs. 458  C) Rs. 558  D) Rs. 568  E) None of these
Explanation:   Area to be plastered = [2(l + b) x h] + (l x b)   = {[2(25 + 12) x 6] + (25 x 12)} m2   = (444 + 300) m2   = 744 m2.   Cost of plastering = Rs. 744 x 75 / 100 = Rs. 558   Answer: Rs. 558
<result>C</result>
A tank is 25 m long, 12 m wide and 6 m deep. The cost of plastering its walls and bottom at 75 paise per sq. m, is: