There is a cylindrical platform of 2m radius 50cm height in school playground. What will be the cost of white washing the curved surface of this platform at the rate of Rs.12.5 per 100sq.cm(π=3.14)
Given ⇒r=200cm⇒h=50cm
circumference (c) =2πr
=2×3.14×200
=1256cm
cylinder surface area =c×h=1256×50
=62,800cm2
cost of whitewashing =628×100cm2
Given 12.5 per Rs-100sqcm
⇒628×12.5=7,850 Rs.