A tank is 25m long 12m wide and 6m deep. The cost of plastering its walls and bottom at 25 paise per sq m is
Choose the correct answer
A) Rs. 186  B) Rs. 258  C) Rs. 486  D) Rs. 586  E) None of these
Explanation:   Rs. 186rea 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— (25/100) = Rs.186 Rs. 186nswer: Rs. 186
<result>A</result>
A tank is 25m long 12m wide and 6m deep. The cost of plastering its walls and bottom at 25 paise per sq m is