A cylinder pillar of a roller is 84 cm and it's in diameter and 3.5 in height find the cost of painting the curved surface of the pillar at the pillar at the of Rs 12.50 per m
Answers
Answer:
Our apps
answr
search
What would you like to ask?
9th
Maths
Surface Areas and Volumes
Surface Area of Right Circular Cylinders and Cones
A cylindrical pillar is 50 ...
MATHS
avatar
Asked on October 15, 2019 by
Allenraj Panale
A cylindrical pillar is 50 cm in diameter and 3.5 m in height. Find the cost of painting the curved surface of the pillar at the rate of 12.50 per m
2
.
MEDIUM
Share
Study later
VIDEO EXPLANATION
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:
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
Explanation:
plz like