Question

the surface of a cylindrical pillar with radius 32 cm and height 3.5 M is to be painted find the cost of painting @ rupees 0.25 per CM square

Answer 1

Radius of pillar = 32 cm
Height of pillar =3.5m = 350 cm

Curved Surface Area of pillar = 2 pi *r *h
= 2 * 22* 32*350/ 7
= 44 *32 * 50 cm^2

Cost = CSA of pillar * Rate
Cost = 44*32*50*25/100
Cost = 22*32*25
Cost =Rs. 17600

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