A stack of 10 quarters is a cylinder. If the diameter of a single quarter is 2.2 cm and the approximate height is 0.17 cm, what is the surface area of a 10-quarter stack?

Answer 1

Total height for 10 quarters
h= 0.17*10=1.7cm
Diameter = 2.2 cm, so radius,
r= 1.1 cm

Total surface area (including two ends)
A=2πr²+2πr*h
=2πr(r+h)

Answer 2

2.794

Answer 3

=6.17