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The cost of painting the total surface area of a cone at 25 paise per cm² is Rs.176. Find the volume of the cone, if its slant height is 25 cm. |
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Answer» 25 pasie = rs1/4 1/4rs = 1m^2 1rs = 4m^2 176 RS = 704 cm^2 TOTAL surface area of cone = πr (r+l) πr^2+πl = 704 3.14×r^2+3.14×25 = 704 3.14r^2+78.5 = 704 3.14= 704-78.5 3.14r^2 = 625.5 πr^2 = 625.5 |
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