Answer:
23
Step-by-step explanation:
waffaline waffalda,sld
V= 105cm^3
V=volume
(1/3)V+40=(5/7)V
(5/7)V-(1/3)V=40
(15/21)V-(7/21)V=40
(8/21)V=40
(21/8)(8/21)V=(21/8)(40
V=21*5
V=105 cm3
(1/3)(105)=35, 35+40=75, 75/105=15/21=5/7
C
Step-by-step explanation
I don't know but these can be really difficult
good luck
The diameter by Pi or The radius multiplied by 2 time Pi
This is because this is how you get the circumference.