Question

A cylindrical pillar is 25 cm in radius and 3.5 m in height. find the curved surface area of the pillar..


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Answer 1

ANSWER

Given:

H=3.5 m, R=

2

50

=25 cm =

100

25

=0.25 m

⇒CSA=2πrh=(2×

7

22

×0.25×3.5) m

2

=5.5 m

2

⇒Cost of painting 1 m

2

area = Rs.12.50

⇒Cost of painting 5.5 m

2

area

= Rs.5.5×12.50

= Rs.68.75

Answer 2

Answer:

LSA of cylinder = 2×pie×r×h

= 2×22/7×0.25×3.5

= 5.5m²

Step-by-step explanation:

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