Question

A cylindrical pillar has a diameter of 56cm and is of 35m high. There are 16 pillars around the building. Find the cost of painting the curved surface area of all the pillars at the rate of Rs.5.50 per 1m square

Answer 1

first find the csa then multiply it with how many by objects and then multiply it with cost of painting u will get the final answer

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