Question

The cost of painting 10 cylinder kal pillar of a building at rupees 3.50 per m 2 to if the diameter and the height of each pillar is 24m and 7 m
respectively

Answer 1

Step-by-step explanation:

H=3.5 m, R=

2

50

=25 cm =

100

25

=0.25 m

⇒CSA=2πrh=(2×

7

22

×0.25×3.5) m

2

=5.5 m

2

⇒Cost of painting 1 m

2

area = Rs.12.50

⇒Cost of painting 5.5 m

2

area

= Rs.5.5×12.50

= Rs.68.75