Question

a cylindrical pillar has a diameter of 56 cm 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 rupees 5•50per1m²
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Answer 1

Answer:

Rs. 5420.8

Step-by-step explanation:

Diameter = 56 cm

So,

Radius = d/2 = 56/2 = 28cm or 0.28m

Height = 35m

Curved Surface area of cylinder = 2πrh

= 2 * (22/7) * 0.28 * 35

= 2 * 22 * 0.28 * 5

= 61.6 m²

C.S.A. of 1 cylinder(pillar) = 61.6 m²

C.S.A. of 16 pilars = 61.6 * 16

= 985.6 m²

Rate of painting = 5.5/m²

Cost = Rate * Area

= 985.6 * 5.5

= Rs. 5420.8

Answer 2

ans is 5420.80

the ans is in detail in the above pictures