The cost of painting the total outside surface of a closed cylindrical oil tank at 50paise per sqdm is Rs.275. The height of the tank is 5 times the radius of the base of the tank. Find its volume .
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275/0.50=550area
total surface area is 2πr(r+h)
550=2πr(r+5r)
275=22/7*6r^2
275*7/22=6r^2
25*7/2=6r^2
175/2*6=r^2
175/12=r^2
1.45=r^2
r=1.2
h=6
volume=π*1.2*1.2*6
22/7*1.2*1.2*6
total surface area is 2πr(r+h)
550=2πr(r+5r)
275=22/7*6r^2
275*7/22=6r^2
25*7/2=6r^2
175/2*6=r^2
175/12=r^2
1.45=r^2
r=1.2
h=6
volume=π*1.2*1.2*6
22/7*1.2*1.2*6
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