Question

A cylindrical piller has a diameterof56cm I'd of 35 m high there are 16 pillars around the building find the cost of painting curved surface area of at the pillars the rate of 5.50 per 1m2

Answer 1

Answer:

The cost of painting curved surface area of at the pillars the rate of 5.50 per 1m2 = RS. 5415.872

Step-by-step explanation:

It is given that,

A cylindrical piller has a diameterof56cm I'd of 35 m high there are 16 pillars around the building and

cost of painting curved surface area of at the pillars the rate of 5.50 per 1m2

Diameter = 56 cm

radius = 56/2 = 28

To find the curved surface area CSA

CSA of cylinder = 2πrh

Here r = 28 cm = 0.28m

h = 35m

CSA = 2πrh = 2 x 3.14 x  0.28 x 35 = 61.544 m^2

To find the CSA of 16 pillers

Total CSA = 16 x 61.544 =984.704 m^2

To find total cost

Total cost = 984.704 x  5.50 = RS 5415.872

Answer 2

$<b><i>$Given,

A cylindrical pillar, diameter = 56cm = 0.56m

i.e. r = 0.28cm

Height h = 35m

Number of pillars n = 16

Curved surface area of a pillar = 2πrh

= 2 × 3.14 × 0.28 × 35

= 61.54cmCurved surface area of 16 pillars = 16 × 61.54

= 984.64cm2

Cost of painting = 5.5 × 984.64

= 5415.52