The height of a cylindrical pillar is 15 m.The diameter of its base is 350cm.What will be the cost of painting the curved surface of pillar at ₹25/m^2
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Answered by
2
Answer:
height = 15m
diameter = 350cm. radius = 350/2
= 175cm = 175/100
= 1.75m
curved surface area of pillar = 2πrh
= 2×22/7×1.75×15
= 2×22×0.25×15
=165m^2
cost of painting C.S.A. of pillar = 165×25
= 4125 Rs.
Answered by
0
Answer:
Solution
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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
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