the inner diameter of a circular well is 4.2 metre it is 12 m deep find its in a curved surface area and the cost of plastering the in a curved surface @ rupees 50 per metre square
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csa of circular well = 2πrh
= 2×22/7×2.2×12
whats ever come ×rs50
= 2×22/7×2.2×12
whats ever come ×rs50
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