A tank is 25m long 12m wide and 6m deep. The cost of plastering its walls and bottom at 30 paise per sq m is  Choose one.
A) Rs. 223.20 B) Rs. 323.20 C) Rs. 423.20 D) Rs. 523.20 E) None of these
Explanation:   Rs. 223.20rea to be plastered = [2(l + b) Ã— h] + (l Ã— b)   = [2(25 + 12) Ã— 6] + (25 Ã— 12) = 744 sq m   Cost of plastering = 744 Ã— (30/100) = Rs.223.20 Rs. 223.20nswer: Rs. 223.20
<result>A</result>
A tank is 25m long 12m wide and 6m deep. The cost of plastering its walls and bottom at 30 paise per sq m is