It is required to make a plastering of sand and cement with 3.5 cm thick surrounding four cylindrical pillars each of whose diameter is 17.5 cm
(i) If each pillar is of 3 metre height let us write by calculating how many cubic dcm of plastering will be needed.
(ii) If the ratio of sand and cement in the plaster material be 4:1 let us write how many cubic dcm of cement will be needed.
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Plz solve 17 It is required to make a plastering of sand and cement with 3 5 cm thick surrounding four cylindrical pillars each of whose diameters ...
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outer radius r=8 75+3 5=12 25 cm inner radius r'=8 75volume of the plaster material required=4πhr2- ... More
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