Question

Find the lateral surface area oftwo pillars ifheight ofthe pillar is 7mand
radius of the base is1.4m.

Answer 1

Answer:

Given s= 7m, h=9 m

Lateral surface area = Area of the curved surface =2πrh=2×

7

22

×7m×9m=396m

2

Total surface area = Area of curved surface + Area of two circular surfaces

=2πrh+2πr

2

=396m

2

+2×

7

22

×7m×7m=(396+308)m

2

=704m

2