Question

A cylindrical container is 84 cm high and has base radius of 4.2 cm. Find the cost of painting its curved surface at the rate of 78 per 100 sq cm.​

Answer 1

Answer:

Rs 169.728

Step-by-step explanation:

h = 84cm

r = 4.2cm

CSA of right circular cylinder = 2 (pie) r*h

= 2*22/7*4.2*84

=2217.6cm²

Now rate of painting = rs 78/100cm²

:. Cost = 78*2.2176

=> rupees 169.728