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A cylindrical vessel, without lid, has t...

A cylindrical vessel, without lid, has to be tin-coated on its both sides. If the radius of the base is 70cm and its height is 1.4 m, calculate the cost of tin-coating at the rate of Rs. 3.50 per `1000c m^2dot`

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Area of cylinderical vessel`=2pirh+pir^2`
`=2*22/7*70*140+22/7*70*70`
`=77000cm^2`
Cost of `1000cm^2=3.5Rs`
Cost of `77000cm^2=3.5*77`
`=269.5rs`.
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