A tank is 25m long 12m wide and 6m deep. The cost of plastering its walls and bottom at 75 paise per sq m is
Correct Answer: Option D
Area to be plastered = \(\left[2\left(l+b\right)\times h\right]+\left(l\times b\right)\)
\(\left[2\left(25+12\right)\times6\right]+\left(25\times12\right)=744sq.m\)
Cost of plastering = \(744\times\frac{75}{100}=Rs.558\)
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