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Sahay Sir > Question Answers > NCERT Class 9 > Maths > Chapter 13 - Surface Areas and Volumes > 7. The inner diameter of a circular well is 3.5m. It is 10m deep. Find (i) its inner curved surface area, (ii) the cost of plastering this curved surface at the rate of Rs. 40 per m^2.

7. The inner diameter of a circular well is 3.5m. It is 10m deep. Find (i) its inner curved surface area, (ii) the cost of plastering this curved surface at the rate of Rs. 40 per m^2.

(ii) the cost of plastering this curved surface at the rate of Rs. 40 per m^2. 7. The inner diameter of a circular well is 3.5m. It is 10m deep. Find (i) its inner curved surface area