Question

diameter of A pillar is 42 cm find the cost of whitewashing it up to height 20 CM @ rupees 2 per metre per centimetre square

Answer 1

... Hope you got it.

Answer 2

The cost of white washing is Rs.5280

Step-by-step explanation:

Diameter of pillar = 42 cm

Radius of pillar =$\frac{42}{2}= 21 cm$

Height of pillar = 20 cm

Curved surface area of pillar =$2 \pi r h = 2 \times \frac{22}{7} \times 21 \times 20 =2640 cm^2$

Cost of white washing 1 sq.cm = rs.2

Cost of white washing 2640 sq.cm. =$2 \times 2640 = rs.5280$

Hence The cost of white washing is Rs.5280

#Learn more:

A cylindrical pillar is 50 cm in diameter and 3.5 metre height find the cost of whitewashing its curved surface at the rate of rupees 1.25 per square metre​

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