Question

A cylindrical vessel without lid has to be tin coated on its boath sides if radius of base is70cm & height is 1.4m . Calculate the cost of tin coating at the rate of Rs3.5per100cm2. 

Answer 1

HEY!!

LSA = 2PIRH
​ = 2* 22/7* 70 * 1.4
= 616 m2
= 61600 cm2
​100 cm2 = Rs 3.5
1 cm2 = 3.5/100
61600 cm2 = ​3.5/100*61600
= Rs 2156
​