Answer:20πmm
Step-by-step explanation:
each pencil diameter=10mm
each pencil diameter=radius Of The band
Radius of band=10mm
Circumference of band=2 x π x radius
Circumference of band=2xπx10
Circumference of band=20π
The length of band is the circumference Of The band
There length of band is 20πmm
volume is 180
surface area (area) is 105.97
Answer:
y=4
a
x^2 + 2xy + y^2 - m^2
= (x+y)^2-m^2