Please solve this question.
A cylindrical well is 21m deep. Its outer and inner diameters are 21m & 14m respectively. Find the cost of renovating the inner curved surface and outer curved surface at the rate of ₹25 per m².
And the answer is ₹57,750.
The best answer will be marked as brainliest..
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Answered by
48
inner curved radius =14/2=7m
inner curved surface area = 2πrh
= 2×22×7× 21/7
= 924 m^2
outer curved surface are = 2×22×10.5×21/7
= 1386 m^2
so cost = (924 + 1386)× 25 = 57,750 rs
inner curved surface area = 2πrh
= 2×22×7× 21/7
= 924 m^2
outer curved surface are = 2×22×10.5×21/7
= 1386 m^2
so cost = (924 + 1386)× 25 = 57,750 rs
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curved surface area = 2πrh
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