veranda of school is supported by 10 pillers . each pillar is 4m high and its diameter 63cm . how mach concrete mixture is required to construct the pillars? the outer covered surface is to be whitewashed. calculate to area to be whitewashed. (in step to step)
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15.84 cm^2 area to be whitewashed.
Step-by-step explanation:
No of pillars = 10
Height = 4m
Diameter = 63cm = 0.63m
Radius = 0.63/2
Total surface area = 2πr (R+ H)
= 2×22×0.63/7 (0.63+4)
= 18.3348 cm^2
CSA to be whitewashed = 2πrh
= 2×22/7×0.63×4
= 15.84 cm^2
15.84 cm^2 area to be whitewashed.
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