A cylindrical oil tank of radius 12 cm and height 15 m is to be painted. The bottom of the tank is fixed on a platform so it can not be painted. Find the cost of painting this tank at Rs 25 per square metre
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Step-by-step explanation:
radius of cylinder =12
height =15
total surface area of cylinder =pie(r)(r+h)
pie(12)(12+15)
=22/7 (27)
=22/7(324)
plat form of cylinder is in circle shape
therefore, area of circle=pie(r)square
TSA of cylinder -area of platform
=22/7(324)-22/7(12x12)
=324-144
=180 ms
,the cost of painting for m square=25
180x25
=4500rs
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