The cost of panting the total outside surface of a closed cylindrical oil tank at 60 paise per sq. dm is Rs 237.60 . The height of the tank is 6 times the radius of the base of the tank . Find its volume correct to two decimal places .
The cost of panting the total outside surface of a closed cylindrical oil tank at 60 paise per sq. dm is Rs 237.60 . The height of the tank is 6 times the radius of the base of the tank . Find its volume correct to two decimal places .
Answers (1)
Solution: We have ,
h = height of the cylindrical pipe = 21 dm = 210cm [ 1 dm = 10cm ]
R = External radius
r = Internal radius
Volume of the copper used in making the pipe
= Volume of the external cylinder - Volume of the internal cylinder