CBSE Class 9CBSE
Share
Notifications

View all notifications
Books Shortlist
Your shortlist is empty

Solution for 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`. - CBSE Class 9 - Mathematics

Login
Create free account


      Forgot password?

Question

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`.

Solution

Given that
Height of the pillar = 3.5m
Radius of the circular end of the pillar=`50/2`cm
=25cm=0.25m
Curved surface area of pillar = 2πrh

=2 ×`22/7× 0.25 × 3.5m^2`

`=5.5m^2`

Cost of painting 21m area – Rs 12.50 
Cost of painting `5.5m^2 area Rs.(5.5 × 12.50)
=Rs. 68.75.
Thus, the cost of painting the CSA pillar is Rs. 68,75

  Is there an error in this question or solution?

APPEARS IN

 R.D. Sharma Mathematics for Class 9 by R D Sharma (2018-19 Session) (with solutions)
Chapter 18: Surface Areas and Volume of a Cuboid and Cube
Q: 3
Solution for question: 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`. concept: Surface Area of a Right Circular Cylinder. For the course CBSE
S
View in app×