Question

A cylindrical pillar is 50 cm in diameter and 3.5 in height.find the cost of panting the curved surface are of pillar at the rate of 12.50

Answer 1

CORRECT QUESTIONS :-

A cylindrical pillar is 50 cm in diameter and 3.5 in height.find the cost of panting the curved surface are of pillar at the rate of 12.50 per m${}^{2}$

Given ,

A cylindrical pillar is 50 cm in diameter and 3.5 in height

find,

the cost of panting the curved surface are of pillar at the rate

REQUIRED ANSWER :-

➠$r = \frac{50}{2} \: cm = 25 \: and \: h = \: 3.5$

➠ covered surface$= \: 2\pi rh$

➠ $(2 \times \frac{22}{7} \times 0.25 \times 3.5)m {}^{2}$

➠ $5.5 \: m \: {}^{2}$

➠ cost of painting the covered RS$= 12.50 \: per \: m {}^{2}$

➠ RS$(5.5 \times 12.5) = rs \: 68.75</strong></p><p><strong>hence \: proved$