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 :

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 : Correct Answer TK. 558

Area to be plastered = 2(l + b)×h  +  (l×b) = 2(25 + 12)×6  +  (25×12) = (444 + 300) = 744m2 ∴ Cost of plastering = 744×75100 Tk. = 558Tk.
Bissoy MCQ

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