Answer:
Circumference = 39.6 cm
We know:
Circumference of a circle = 2πr
⇒39.6 =2×
22
7
×r⇒
39.6×7
2×22
=r⇒r=6.3 cm
Also,
Area of the circle = πr2
=
22
7
×6.3×6.3=124.74 cm2
Step-by-step explanation:
<em>#</em><em>C</em><em>arryOnLearning</em>
They can be derived by using calculus(integration to be precise)


(its how pi is defined)
so that gives circumference
to get area , you use integration


that gives the area.
if you don't know calculus yet ,dont worry, just remember the formulae.
<span>1/3m = 12-m
1/3m+m=</span>12
2m=12/(1/3)
2m=36
m=18
Answer:
51
Step-by-step explanation:
A1 = 2 (first term)
r = -1 (common ratio or second divided by first)