A swimming pool is 20 m in length ,15 m in breadth and 4 m in depth . Find the cost of cementing its floor and walls at the rate of rupees 12 per square metre .
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area to be painted = 2(lb+bh+hl) = 2*(300+60+80) = 880cm²
cost total = ₹ 880*12 = 10560 (Ans.)
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