Question

a cylindrical piller 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 ₹5.50 per 1m

Answer 1

Hope so this is the correct 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