#### Question

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

per 1000 cm2.

#### Solution

Given that

r = 70cm, h =1.4m =140cm

∴Area to be tin coated=`2(2pirh+pir^2)=2pir(2h+r)`

=`2xx22/7xx70(280+70)`

`=154000cm^2`

Required cost =`(154000xx3.50)/1000=Rs.539.`

Is there an error in this question or solution?

Solution A Cylindrical Vessel, Without Lid, Has to Be Tin-coated on Its Both Sides. If the Radius of The Base is 70 Cm and Its Height is 1.4 M, Calculate the Cost of Tin-coating at the Rat Concept: Surface Area of a Right Circular Cylinder.