Question

In a building there are 25 cylindrical pillars.The radiusof each pillar is 27cm and height is 4cm.Find the cost of painting the curved surface area of all pillars at the rate of 8 rs per m2( meter square)?

Answer 1

Step-by-step explanation:

. The candy shop _________________ S. K. Road closes around 10 o'clock.

. The candy shop _________________ S. K. Road closes around 10 o'clock.

. The candy shop _________________ S. K. Road closes around 10 o'clock.

Answer 2

Cost of painting 25 cylindrical pillars is Rs. 13.4

Step-by-step explanation:

Given :

Height of each pillar = 4 cm = $\frac{4}{100} \text{m}$

Radius of each pillar = 27 cm = $\frac{27}{100} \text{m}$

Curved Surface Area of 1 Pillar

Curved Surface Area = 2πrh

                                   = $2 \text{x} \frac{22}{7} \text{x} \frac{27}{100} \text{x} \frac{4}{100}$

                                   = 2 x 3.14 x .27 x 0.04

                                  = 0.067 m²

Total number of pillars = 25

Total curved surface area of 25 pillars = 25 x 0.067 = 1.675 m²

Cost of painting is Rs. 8 per m²

∴ Total cost of painting = 1.675 x 8 =  Rs. 13.4

To Learn More.....

1. The curved surface area of a right circular cylinder of base radius 3cm is 94.2cm^2.The volume (in cm^3) of the cylinder is ?(take pi = 3.14)​

https://brainly.in/question/11091571

2. Find the curved surface area and total surface area of the each of the following right circular cones

https://brainly.in/question/1791407