Question

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Answer 1

Answer:

1,508.5714285716cm^2

Step-by-step explanation:

curved surface area of cylinder = 2×pi×r×h

:. 2×22/7×12×5 = curved surface area.

:. curved surface area = 377.1428571429cm^2

We have to find the curved surface area of 4 cylinders

:. 377.1428571429×4

= 1,508.5714285716cm^2

Answer 2

Answer:

Curved surface area = 66000cm^2 of each pillar

264000cm^2 of four pillars

Step-by-step explanation:

radius 21 cm,h 5m=500cm

CSA= 2*22/7*21*500= 66000cm^2

therefore CSA of four pillars= 4*66000=264000cm^2