Question

An open top cylindrical container has radius 10 cm
and height 30 cm. Find the cost of painting 20 such
cylindrical containers from outside at 105 .
per sq. m​

Answer 1

r = 10

h = 30

area to be painted = 2πrh + 2πr

= 2πr(h+1)

= (440 x 31) /7

total area of 20 cylinders = 440 x 20 x 31/7

total cost = find it out yourself