Question

a cylindrical pillar is 50cm. in diameter and 3.5in height.find the cost of painting curved surface of the pillar at the rate of 12.50 per sq. m.​

Answer 1

Answer:

Step-by-step explanation:

Radius=0.25m

Height=3.5m

Radius=1m

CSA=2pie rh

=2×22/7×0.25×3.5

=5.5m^2

Cost of painting one m^2=12.50

Cost of painting 5.5m^2=12.50×5.5

=68.75ruppees.

Hope it helped you..................

Answer 2

Answer:

i hope that the height is in cm but i did it using m and cm

Step-by-step explanation:

curved surface area of cylinder=2x22/7x3.5x25

                                                   =4950cm2

                                                   =0.495m2

cost of painting=0.495x12.50

                         =6.1875

if the height is in m,then

csa=2x22/7x3.5x0.25

    =5.5m2

cost=5.5x12.50

      =68.75