Question

A cylindrical pillar is 50 cm in diameter and 3.5 m in height. Find the cost of painting the curved surface of the pillar at the rate of Rs. 12.50 per m^2.
(Assume π = 22/7)​

Answer 1

Step-by-step explanation:

Curved surface area of pillar = 2πrh

height of cylinder pillar = 3.5 m

radius of circular end of pillar =

$\frac{50}{2} = 25 \: cm$

$r = 25 \times \frac{1}{100} m \\ = > r = 0.25m$

Curved surface area of pillar =

$(2 \times \frac{27}{2} \times 0.25 \times 3.5) {m}^{2 } \\ = > (44 \times 0.125) {m}^{2} \\ = > 5.5 {m}^{2}$