Q7. Find the volume and the curved surface area of a sphere of radius 5.6 cm
(2m)
08. A cylindrical pillar is 40 cm in diameter and 3.5 cm in height. Find the cost of painting the curved
surface of the pillar at the rate of Rs. 12.50 per m².
(2 m)
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Answered by
2
Answer:
Given:
H=3.5 m, R=250=25 cm =10025=0.25 m
⇒CSA=2πrh=(2×722×0.25×3.5) m2
=5.5 m2
⇒Cost of painting 1 m2 area = Rs.12.50
⇒Cost of painting 5.5 m2 area
= Rs.5.5×12.50
= Rs.68.75
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0
Answer:
=394.24 it is the ans mof first
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